Erythrocyte glutamic-pyruvic transaminase (EGPT) and
glutamic-oxaloacetic transaminase (EGOT) activities reflect
vitamin B₆ status in humans (Baysal, Johnson, and Linkswiler,
1966). Pyridoxal phosphate (PALPO), an active form
of vitamin B₆, serves as the coenzyme for these transaminases.
Compared to other methods of vitamin B₆ assessment,
transaminase measurement has the advantage of...
Calcium concentration and its regulation was examined in
tissues of larval Rana catesbiana. Considerable variability was
found in tissue calcium that could not be explained by stage of development.
A seasonal effect was observed, with plasma calcium decreasing
and muscle calcium increasing during winter. Total plasma
calcium concentration reflects, within...