Complex interaction of Hb Hekinan [α27(B8) Glu–Asp] and Hb E [β26(B8) Glu–Lys] with a deletional α‐thalassemia 1 in a Thai family
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Bibliographic record
Abstract
Hemoglobin (Hb) Hekinan (alpha27; Glu-Asp) is a rare alpha-chain variant found mainly in Japanese and Chinese whereas Hb E (beta26; Glu-Lys) is common among Southeast Asians. We report a hitherto undescribed condition in which these two variants co-segregate. The proband was a 25-yr-old Thai woman who was encountered with the presence of mild hypochromic microcytosis with Hb 8.2 g/dL, hematocrit (Hct) 26.0%, Mean Corpuscular Value (MCV) 68.6 fL, Mean Corpuscular Hemoglobin (MCH) 21.6 pg and Mean Corpuscular Hemoglobin Concentration (MCHC) 31.5 g/dL. Although Hb electrophoresis at alkaline pH did not show any abnormal band except Hb E in addition to Hb A, high performance liquid chromatography analysis revealed abnormal peaks at the Hb A and Hb E positions. DNA analysis of the proband revealed a GAG-GAT mutation at codon 27 of the minor alpha1-globin gene for Hb Hekinan in trans to the South-east Asian (SEA) deletional alpha-thalassemia 1 determinant and a GAG-AAG mutation at codon 26 of the beta-globin gene for Hb E. She was therefore a triple heterozygote for these three anomalies. Family study identified that her mother was a double heterozygote for Hb Hekinan and Hb E without alpha-thalassemia whereas her father was a classical Hb H disease patient. The genotype-phenotype relationship observed in this Thai family with complex hemoglobinopathies is presented and a simple DNA assay based on the polymerase chain reaction methodology for rapid diagnosis of Hb Hekinan is described.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it