title: Genetic control of F cells in human adults.
abstract: Hb F levels were determined on samples from 750 normal blood donors. Six individuals (0.8%) had Hb F levels in excess of 1.1%, the upper end of the continuous distribution. Eight individuals at the upper end and 7 individuals at the lower end of the range were selected for family studies. These studies revealed that the control of Hb F levels in adults, as judged by the more sensitive F-cell technique, has a major genetic component. Structural analysis of the Hb F in several cases demonstrated that both G gamma and A gamma chains were present, but in variable proportions. These results are discussed in light of current concepts of adult F-cell production.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D005319:Fetal Hemoglobin / Q000235:genetics*; D005455:Fluorescent Antibody Technique; D006801:Humans; D008297:Male; D010375:Pedigree; D010455:Peptides / Q000235:genetics
chemical_list: D010455:Peptides; D005319:Fetal Hemoglobin