title: Microheterogeneity of glucose-6-phosphate dehydrogenase phenotypes.
abstract: Glucose-6-phosphate dehydrogenase (G-6-PD) is the first enzyme of the pentose phosphate pathway and has been extensively investigated. Several variants of G-6-PD were encountered in different regions of Saudi Arabia during an extensive screening programme. A modified rapid isoelectric focussing procedure using LKB Ampholine PAG plates (pH 5.5-8.5) was used to separate the isoenzymes of G-6-PD. G-6-PD-B+ (the normal enzyme) was separated into five major and three minor fractions. The pattern obtained for G-6-PD-A+, G-6-PD-A-, G-6-PD-Mediterranean and G-6-PD-Mediterranean-like showed that the variants differ significantly in their isoenzyme pattern. In this paper it is shown that isoelectric focussing is a sensitive, powerful and reproducible technique to study microheterogeneity of red cell enzymes.
authors.affiliation: Medical Biochemistry Department(30), College of Medicine & King Khalid Hospital, Riyadh, Saudi Arabia.
authors.forename: M A
authors.initials: MA
authors.lastname: el-Hazmi
mesh_terms: D005954:Glucosephosphate Dehydrogenase / Q000097:blood*; D006801:Humans; D007525:Isoelectric Focusing / Q000379:methods; D007527:Isoenzymes / Q000097:blood*; D010641:Phenotype; D012529:Saudi Arabia
chemical_list: D007527:Isoenzymes; D005954:Glucosephosphate Dehydrogenase