PubMed Health⌕ Search

Biomedical subjects

P T Wade

Publications and source records attributed to P T Wade.

8 recordsLinked to original sources

Characterization of a series of electrophoretic and enzyme activity variants of human glucose-phosphate isomerase.

A total of 3438 cord blood samples were screened for variants of erythrocyte glucose-phosphate isomerase. The five different electrophoretic, three activity/deficiency, and one thermostability variants distributed among 27 unrelated Caucasian families of that population, plus two electrophoretic variants previously described from three Amerindian tribes were subsequently examined for cryptic variation using activity and thermostability criteria. Although thermostability differences were observed between electrophoretic variants, no microheterogeneity within any one class of variant was detected.

Alleles↗

Variation in erythrocyte enzyme activity among primate species.

Significant differences between species in the mean level of enzyme activity, ranging from 50 to 400%, were detected during a study of 10 enzymes from erythrocytes of humans and five non-human primates. The activity differences were consistent with variation, between species, at the structural loci for specific enzymes rather than differences in mean cell age, hemoglobin content or other pleiotropic effects. For seven of the eight loci at which direct comparisons among the six species could be made, the number of species-specific activity differences was greater than the number of variants observed by electrophoresis. Thus not only do activity measurements detect previously "hidden" variation among species but they also provide information regarding genetic differences which may be of potential physiological and/or selective relevance.

Animals↗