{
  "schemaVersion": 2,
  "recordType": "hypothetical-teaching-example",
  "isHypotheticalTeachingExample": true,
  "exampleId": "TEACH-HB-01",
  "exampleLocale": "en",
  "dataOrigin": "static-teaching-artifact",
  "warning": "HYPOTHETICAL TEACHING EXAMPLE, NOT PERFORMED OR MEASURED. Edits do not remove this label. Clear the forms before starting a real experimental record.",
  "experiment": {
    "project": "TEACH-HB-01 — hypothetical secondary-antibody titration; NOT PERFORMED.",
    "date": "Not applicable: no experiment was performed. For a real record, enter actual run date and timestamps.",
    "operator": "Not applicable to this hypothetical example. Enter the operator’s name for a real experiment.",
    "target": "Assumed unmodified, known-positive whole-cell target; identity/antibody product not assigned.",
    "expectedSize": "50 kDa assigned for teaching; verify the actual isoform, processing and datasheet.",
    "sample": "Hypothetical positive whole-cell lysate split into matched repeat lanes. Species, cell line, treatment, collection time and aliquot ID: not specified in this example.",
    "positiveControl": "Assumed known-positive lysate for the same target and primary; A/B use matched repeat material. Actual provenance and storage are unknown.",
    "negativeControl": "C/D omit primary but retain matched lysate and secondary. These are detection-stage controls, NOT genetic negatives or evidence of target specificity. No knockout control is included.",
    "normalization": "Compare continuous total protein across equivalent strips to check matching. Do not make relative-expression claims: target and normalization loading-response ranges are not validated in this teaching case.",
    "lysis": "Planned: a supplier-compatible whole-cell extraction preserving the target. Actual buffer composition, inhibitors, extraction time, clarification and recovery were not recorded because no sample was prepared. Hold the same aliquot preparation fixed for A–D.",
    "concentration": "No concentration assay or measured result. Teaching arithmetic only: if concentration is 2 µg/µL, 20 µg requires 10 µL lysate. Replace this assumption with a compatible assay and the measured concentration.",
    "loading": "Planned 20 µg per repeat lane. Illustrative 20 µL final volume: 10 µL assumed 2 µg/µL lysate + 5 µL 4× sample buffer + 5 µL water. No actual pipetting or gel-capacity check performed.",
    "heating": "Planned final 1× target-compatible sample buffer. Reducing agent and heating are not assigned; choose according to target and antibody instructions, then keep them identical across groups. No actual temperature/time log.",
    "gel": "Mini-gel compatible with a 50 kDa target. Gel chemistry/percentage, electrophoresis voltage and run time are unknown; they must be filled from the actual system record. Use matching gels and lane maps across the comparison.",
    "transfer": "Planned 0.2 µm nitrocellulose, same membrane lot and transfer workflow across groups. System, buffer, current/voltage/time and cooling are not assigned. Follow the actual system’s instructions; no transfer was performed.",
    "transferEvidence": "Assigned teaching observation: continuous total-protein lanes across the target region. No real stain or image exists. Actual record must link the uncropped pre-antibody transfer-stain image.",
    "blocking": "Illustrative CST-compatible baseline: 5% nonfat milk in 1× TBS/0.1% Tween-20, 1 h at room temperature with gentle agitation. Check the primary antibody’s recommended blocker and diluent before using this condition.",
    "primary": "Unnamed teaching primary: catalog/lot/dilution unknown. A/B use the same fresh primary at its product-recommended dilution/diluent, illustrative overnight 4°C; C/D receive identical diluent without primary. Product and lot: not specified.",
    "secondary": "Assumed compatible HRP secondary, unnamed product/unknown lot. A/C 1:2,000; B/D 1:4,000; illustrative 1 h room temperature. These are teaching titration values, not optimum dilutions for every product.",
    "washing": "Illustrative baseline: fresh 1× TBS/0.1% Tween-20, three 5-minute washes after each antibody incubation with gentle agitation. Use equal tray coverage and replacements. Actual membrane area and wash volume are unrecorded; CST specifies 15 mL for a 10 × 10 cm membrane.",
    "detection": "Same assumed HRP/ECL product and substrate preparation across groups; product/lot, imager model and gain unknown. Match substrate-to-acquisition delay. Follow the actual product mixing instructions; no preparation or imaging performed.",
    "exposures": "Assigned comparison: matched 10 s illustrative exposure; B target visible without clipped pixels. No measured pixels or actual exposure series. Actual assay needs raw short/long exposures and a demonstrated usable range.",
    "files": "No raw experimental files. Schematic: /case-library#lesson-case-secondary. Actual record should provide immutable/raw-file identifiers and uncropped image locations, not only a cropped presentation figure.",
    "notes": "Hypothetical outcome: A/C remain gray; B/D background decreases; B retains target at matched exposure. Supports a secondary-concentration contribution in this scenario. Does not validate specificity, detection limits or quantification; independent repeat and loading-range confirmation remain planned."
  },
  "troubleshooting": {
    "caseId": "TEACH-HB-01 — hypothetical / not performed.",
    "date": "Not applicable; no actual run date. Teaching-record date is not an experiment date.",
    "pattern": "Assigned whole membrane: uniform gray inter-lane background; expected 50 kDa band still readable. No-primary strip also gray. Shorter exposure reduces background but weakens the required target.",
    "image": "No uncropped laboratory image. Schematic at /case-library#lesson-case-secondary; matched 10 s exposure is illustrative, not measured.",
    "marker": "Expected target assigned 50 kDa; real marker product/positions unknown. Preserve a full marker and membrane map in the actual record.",
    "controls": "A/B matched known-positive teaching lysate + primary; C/D same material, no primary. Total protein assigned continuous. No genetic negative; target specificity is unresolved.",
    "transfer": "Assigned continuous total protein across all equivalent target regions; actual stain and post-transfer gel were not collected. This reduces gross transfer suspicion in the scenario only.",
    "scope": "Global / inter-lane membrane background including a no-primary strip; not assigned to a single sample or membrane coordinate.",
    "earliest": "Assigned after secondary/ECL acquisition; the precise onset is unknown because no intermediate laboratory images exist.",
    "hypothesisA": "Excess retained secondary antibody may contribute to broad background. A dilution effect in no-primary controls would support a secondary/detection-stage contribution.",
    "hypothesisB": "Insufficient wash exchange or substrate/tray contamination. Primary cross-reactivity may coexist but cannot alone explain gray no-primary strips.",
    "evidenceNeeded": "A/B primary-present and C/D no-primary strips, matched positive lysate/transfer, same wash and acquisition. Compare secondary dilution effects on both background and usable target, not membrane whiteness alone.",
    "oneVariable": "Secondary concentration only: illustrative 1:2,000 versus 1:4,000. Primary omission in C/D is a diagnostic control, not another optimization.",
    "fixed": "20 µg matched lysate; target area; gel/transfer/membrane; primary in A/B; blocker/diluent; incubation time/temperature; wash composition, volume and exchange; ECL batch; exposure/gain/delay. Product lots: not recorded.",
    "before": "Planned A/C: HRP secondary 1:2,000; A with primary, C without. Expected baseline observation assigned gray membrane. No actual pre-change data.",
    "after": "Planned B/D: same secondary at 1:4,000; B with primary, D without. Predefine: less matched background, required positive band retained, no clipping, later independent confirmation.",
    "outcome": "HYPOTHETICAL OUTCOME: A/C gray; B/D less background; B expected band retained at matched 10 s exposure. No measured intensity, image or replicate.",
    "conclusion": "Supports a concentration-dependent secondary contribution under the assigned conditions only. Independent repeat and working-range validation remain undone. If C/D remain gray, test wash/substrate; if C/D clean but A/B stay dark, test primary dilution/diluent with suitable negatives. Does not prove target specificity or justify quantification."
  },
  "localizedRecords": {
    "en": {
      "schemaVersion": 2,
      "recordType": "hypothetical-teaching-example",
      "isHypotheticalTeachingExample": true,
      "exampleId": "TEACH-HB-01",
      "exampleLocale": "en",
      "dataOrigin": "static-teaching-artifact",
      "warning": "HYPOTHETICAL TEACHING EXAMPLE, NOT PERFORMED OR MEASURED. Edits do not remove this label. Clear the forms before starting a real experimental record.",
      "experiment": {
        "project": "TEACH-HB-01 — hypothetical secondary-antibody titration; NOT PERFORMED.",
        "date": "Not applicable: no experiment was performed. For a real record, enter actual run date and timestamps.",
        "operator": "Not applicable to this hypothetical example. Enter the operator’s name for a real experiment.",
        "target": "Assumed unmodified, known-positive whole-cell target; identity/antibody product not assigned.",
        "expectedSize": "50 kDa assigned for teaching; verify the actual isoform, processing and datasheet.",
        "sample": "Hypothetical positive whole-cell lysate split into matched repeat lanes. Species, cell line, treatment, collection time and aliquot ID: not specified in this example.",
        "positiveControl": "Assumed known-positive lysate for the same target and primary; A/B use matched repeat material. Actual provenance and storage are unknown.",
        "negativeControl": "C/D omit primary but retain matched lysate and secondary. These are detection-stage controls, NOT genetic negatives or evidence of target specificity. No knockout control is included.",
        "normalization": "Compare continuous total protein across equivalent strips to check matching. Do not make relative-expression claims: target and normalization loading-response ranges are not validated in this teaching case.",
        "lysis": "Planned: a supplier-compatible whole-cell extraction preserving the target. Actual buffer composition, inhibitors, extraction time, clarification and recovery were not recorded because no sample was prepared. Hold the same aliquot preparation fixed for A–D.",
        "concentration": "No concentration assay or measured result. Teaching arithmetic only: if concentration is 2 µg/µL, 20 µg requires 10 µL lysate. Replace this assumption with a compatible assay and the measured concentration.",
        "loading": "Planned 20 µg per repeat lane. Illustrative 20 µL final volume: 10 µL assumed 2 µg/µL lysate + 5 µL 4× sample buffer + 5 µL water. No actual pipetting or gel-capacity check performed.",
        "heating": "Planned final 1× target-compatible sample buffer. Reducing agent and heating are not assigned; choose according to target and antibody instructions, then keep them identical across groups. No actual temperature/time log.",
        "gel": "Mini-gel compatible with a 50 kDa target. Gel chemistry/percentage, electrophoresis voltage and run time are unknown; they must be filled from the actual system record. Use matching gels and lane maps across the comparison.",
        "transfer": "Planned 0.2 µm nitrocellulose, same membrane lot and transfer workflow across groups. System, buffer, current/voltage/time and cooling are not assigned. Follow the actual system’s instructions; no transfer was performed.",
        "transferEvidence": "Assigned teaching observation: continuous total-protein lanes across the target region. No real stain or image exists. Actual record must link the uncropped pre-antibody transfer-stain image.",
        "blocking": "Illustrative CST-compatible baseline: 5% nonfat milk in 1× TBS/0.1% Tween-20, 1 h at room temperature with gentle agitation. Check the primary antibody’s recommended blocker and diluent before using this condition.",
        "primary": "Unnamed teaching primary: catalog/lot/dilution unknown. A/B use the same fresh primary at its product-recommended dilution/diluent, illustrative overnight 4°C; C/D receive identical diluent without primary. Product and lot: not specified.",
        "secondary": "Assumed compatible HRP secondary, unnamed product/unknown lot. A/C 1:2,000; B/D 1:4,000; illustrative 1 h room temperature. These are teaching titration values, not optimum dilutions for every product.",
        "washing": "Illustrative baseline: fresh 1× TBS/0.1% Tween-20, three 5-minute washes after each antibody incubation with gentle agitation. Use equal tray coverage and replacements. Actual membrane area and wash volume are unrecorded; CST specifies 15 mL for a 10 × 10 cm membrane.",
        "detection": "Same assumed HRP/ECL product and substrate preparation across groups; product/lot, imager model and gain unknown. Match substrate-to-acquisition delay. Follow the actual product mixing instructions; no preparation or imaging performed.",
        "exposures": "Assigned comparison: matched 10 s illustrative exposure; B target visible without clipped pixels. No measured pixels or actual exposure series. Actual assay needs raw short/long exposures and a demonstrated usable range.",
        "files": "No raw experimental files. Schematic: /case-library#lesson-case-secondary. Actual record should provide immutable/raw-file identifiers and uncropped image locations, not only a cropped presentation figure.",
        "notes": "Hypothetical outcome: A/C remain gray; B/D background decreases; B retains target at matched exposure. Supports a secondary-concentration contribution in this scenario. Does not validate specificity, detection limits or quantification; independent repeat and loading-range confirmation remain planned."
      },
      "troubleshooting": {
        "caseId": "TEACH-HB-01 — hypothetical / not performed.",
        "date": "Not applicable; no actual run date. Teaching-record date is not an experiment date.",
        "pattern": "Assigned whole membrane: uniform gray inter-lane background; expected 50 kDa band still readable. No-primary strip also gray. Shorter exposure reduces background but weakens the required target.",
        "image": "No uncropped laboratory image. Schematic at /case-library#lesson-case-secondary; matched 10 s exposure is illustrative, not measured.",
        "marker": "Expected target assigned 50 kDa; real marker product/positions unknown. Preserve a full marker and membrane map in the actual record.",
        "controls": "A/B matched known-positive teaching lysate + primary; C/D same material, no primary. Total protein assigned continuous. No genetic negative; target specificity is unresolved.",
        "transfer": "Assigned continuous total protein across all equivalent target regions; actual stain and post-transfer gel were not collected. This reduces gross transfer suspicion in the scenario only.",
        "scope": "Global / inter-lane membrane background including a no-primary strip; not assigned to a single sample or membrane coordinate.",
        "earliest": "Assigned after secondary/ECL acquisition; the precise onset is unknown because no intermediate laboratory images exist.",
        "hypothesisA": "Excess retained secondary antibody may contribute to broad background. A dilution effect in no-primary controls would support a secondary/detection-stage contribution.",
        "hypothesisB": "Insufficient wash exchange or substrate/tray contamination. Primary cross-reactivity may coexist but cannot alone explain gray no-primary strips.",
        "evidenceNeeded": "A/B primary-present and C/D no-primary strips, matched positive lysate/transfer, same wash and acquisition. Compare secondary dilution effects on both background and usable target, not membrane whiteness alone.",
        "oneVariable": "Secondary concentration only: illustrative 1:2,000 versus 1:4,000. Primary omission in C/D is a diagnostic control, not another optimization.",
        "fixed": "20 µg matched lysate; target area; gel/transfer/membrane; primary in A/B; blocker/diluent; incubation time/temperature; wash composition, volume and exchange; ECL batch; exposure/gain/delay. Product lots: not recorded.",
        "before": "Planned A/C: HRP secondary 1:2,000; A with primary, C without. Expected baseline observation assigned gray membrane. No actual pre-change data.",
        "after": "Planned B/D: same secondary at 1:4,000; B with primary, D without. Predefine: less matched background, required positive band retained, no clipping, later independent confirmation.",
        "outcome": "HYPOTHETICAL OUTCOME: A/C gray; B/D less background; B expected band retained at matched 10 s exposure. No measured intensity, image or replicate.",
        "conclusion": "Supports a concentration-dependent secondary contribution under the assigned conditions only. Independent repeat and working-range validation remain undone. If C/D remain gray, test wash/substrate; if C/D clean but A/B stay dark, test primary dilution/diluent with suitable negatives. Does not prove target specificity or justify quantification."
      }
    },
    "zh": {
      "schemaVersion": 2,
      "recordType": "hypothetical-teaching-example",
      "isHypotheticalTeachingExample": true,
      "exampleId": "TEACH-HB-01",
      "exampleLocale": "zh",
      "dataOrigin": "static-teaching-artifact",
      "warning": "HYPOTHETICAL TEACHING EXAMPLE, NOT PERFORMED OR MEASURED. Edits do not remove this label. Clear the forms before starting a real experimental record.",
      "experiment": {
        "project": "TEACH-HB-01 — 假设二抗滴定教学；未执行。",
        "date": "不适用：没有执行实验。真实记录应填实际运行日期与时间。",
        "operator": "假设示例不适用；实际实验填写实验人员姓名。",
        "target": "假定全细胞中已知阳性的未修饰目标；未指定蛋白身份/抗体产品。",
        "expectedSize": "50 kDa 为教学设定；实际应核对异构体、加工形式和产品资料。",
        "sample": "假设阳性全细胞裂解液，分到匹配的重复泳道。物种、细胞系、处理、取样时间和分装编号：示例未指定。",
        "positiveControl": "假定对相同目标及一抗已知阳性裂解液；A/B 使用匹配重复材料。实际来源与储存未知。",
        "negativeControl": "C/D 去一抗但保留匹配裂解液和二抗；它们是检测阶段对照，不是遗传阴性，也不建立目标特异性。示例未设置敲除对照。",
        "normalization": "比较等价膜条连续总蛋白以检查匹配；不作相对表达结论，本教学案例未验证目标及归一化信号的上样响应范围。",
        "lysis": "计划：使用供应商兼容的全细胞提取以保留目标。没有制备样本，故实际裂解液组成、抑制剂、提取时间、澄清与回收均未记录；A–D 固定同一分装制备方式。",
        "concentration": "无浓度测定或实测结果。仅教学算术：若浓度为 2 µg/µL，20 µg 需要 10 µL 裂解液；实际应替换为兼容方法及实测浓度。",
        "loading": "计划每个重复泳道 20 µg；示范终体积 20 µL：假定 2 µg/µL 裂解液 10 µL + 4× 上样液 5 µL + 水 5 µL。未实际移液或检查胶容量。",
        "heating": "计划终浓度 1× 的目标兼容上样液。未设定还原剂和加热参数，应按目标与抗体说明选择并在组间保持一致；没有实际温度/时间日志。",
        "gel": "适合 50 kDa 目标的小型胶。胶化学/浓度、电泳电压及时间未知，应据实际系统记录填写；比较中使用匹配胶和泳道图。",
        "transfer": "计划 0.2 µm 硝酸纤维素膜，各组固定膜批次与转膜流程。未设定系统、转膜液、电流/电压/时间及冷却；应遵守实际系统说明，没有执行转膜。",
        "transferEvidence": "教学设定观察：目标区域各泳道总蛋白连续；不存在真实染色或图像。实际记录必须关联抗体前未裁切转膜染色图。",
        "blocking": "CST 兼容示范基线：1× TBS/0.1% Tween-20 中 5% 脱脂奶粉，室温轻柔摇动 1 小时。使用前先查一抗推荐的封闭剂和稀释液。",
        "primary": "未指定教学一抗：货号/批次/稀释倍数未知。A/B 用同种新配一抗和产品推荐稀释/稀释液，示范 4°C 过夜；C/D 仅用相同稀释液。产品和批号：未指定。",
        "secondary": "假定兼容 HRP 二抗，未指定产品/批次未知。A/C 1:2,000；B/D 1:4,000；示范室温 1 小时。这些是教学滴定值，不是所有产品的最优倍数。",
        "washing": "示范基线：每次抗体孵育后，用新鲜 1× TBS/0.1% Tween-20 轻柔摇动洗 3 次、每次 5 分钟，各组托盘覆盖及换液一致。实际膜面积和洗液体积未记录；CST 对 10 × 10 cm 膜指定 15 mL。",
        "detection": "各组假定同种 HRP/ECL 产品及底物配制；产品/批次、成像型号和增益未知。匹配加底物到采集延迟；按实际产品混配说明，没有配制或成像。",
        "exposures": "设定比较：匹配的示范 10 秒曝光，B 目标可见且未截顶。无实测像素或实际曝光系列；真实方法需要原始长短曝光及已证明可用范围。",
        "files": "没有实验原始文件；示意位于 /zh/case-library#lesson-case-secondary。实际应记录原始文件标识及未裁切图位置，不能只留裁切展示图。",
        "notes": "假设结果：A/C 仍灰，B/D 背景降低，B 在匹配曝光保留目标。支持本场景二抗浓度贡献；未验证特异性、检测限或定量，独立重复和上样范围确认仍是计划。"
      },
      "troubleshooting": {
        "caseId": "TEACH-HB-01 — 假设教学/未执行。",
        "date": "不适用；无真实运行日期。教学记录日期不等于实验日期。",
        "pattern": "整膜设定：泳道间均匀灰背景，预期 50 kDa 条带仍可辨；去一抗条也灰。短曝光减轻背景但所需目标变弱。",
        "image": "没有未裁切实验图。排障示意图位于 /zh/case-library#lesson-case-secondary；匹配 10 秒曝光为示范，并非实测。",
        "marker": "预期目标设为 50 kDa；真实 marker 产品/位置未知。实际记录应保留完整 marker 与膜图。",
        "controls": "A/B 匹配假设阳性裂解液+一抗；C/D 同材料去一抗。总蛋白设为连续；无遗传阴性，目标特异性未解决。",
        "transfer": "设定各等价目标区域总蛋白连续；未收集实际染色与转膜后胶。仅在场景中降低大范围转膜嫌疑。",
        "scope": "全局/泳道间膜背景，包含去一抗条；不归于单个样本或固定膜坐标。",
        "earliest": "设定在二抗/ECL 采集后观察；没有中间实验图，具体发生起点未知。",
        "hypothesisA": "残留二抗过多可能造成整膜背景。去一抗对照随稀释改善，可支持二抗/检测阶段贡献。",
        "hypothesisB": "洗膜交换不足或底物/托盘污染。一抗交叉反应可并存，但单独不能解释去一抗条灰。",
        "evidenceNeeded": "A/B 有一抗和 C/D 去一抗，匹配阳性裂解液/转膜，洗膜与采集相同；比较二抗稀释对背景及可用目标的影响，而非只看膜是否白。",
        "oneVariable": "唯一优化变量二抗浓度：示范 1:2,000 对 1:4,000。C/D 去一抗是诊断对照，不是另一个优化变量。",
        "fixed": "20 µg 匹配裂解液、目标区、胶/转膜/膜、A/B 一抗、封闭/稀释液、孵育时温、洗液组成/体积/换液、ECL 批次、曝光/增益/延迟保持不变；产品批次：未记录。",
        "before": "计划 A/C：HRP 二抗 1:2,000，A 有一抗、C 去一抗；基线观察设为灰膜，没有实测修改前数据。",
        "after": "计划 B/D：相同二抗 1:4,000，B 有一抗、D 去一抗；预先要求匹配背景下降、保留所需阳性条带、未截顶，并后续独立确认。",
        "outcome": "假设结果：A/C 灰，B/D 背景较低，B 在匹配 10 秒曝光保留预期条带；无实测强度、图或重复。",
        "conclusion": "仅支持设定条件下浓度依赖的二抗贡献；独立重复和工作范围验证尚未执行。若 C/D 仍灰，比较洗膜/底物；若 C/D 干净而 A/B 暗，带适当阴性比较一抗稀释/稀释液。未证明特异性，不能据此定量。"
      }
    }
  }
}