vitamin b6 deficiency was assessed by the in vitro activity of erythrocyte glutamic pyruvic transaminase ( egpt ) , without ( basal ) and with ( stimulated ) the addition of pyridoxal-5-phosphate to the assay , and the egpt index ( stimulated activity ./ . basal activity ) .
C0936215
vitamin b6 deficiency
C0034266
pyridoxal-5-phosphate