the ratios of okt activity at 0.04 mm plp compared with activity at 0 mm plp were , respectively , lowest for controls ( 1.18 +/- 0.18 ; n = 12 ) , intermediate for pyridoxine-nonresponsive heterozygotes ( 1.43 +/- 0.26 ; n = 5 ) , and highest for pyridoxine-responsive heterozygotes ( 2.20 +/- 0.14 ; n = 3 ) .
C0034266
plp
C0034272
responsive