thiamin and erythrocyte transketolase ( ec 2.2.1.1 ) activity , riboflavin , nicotinic acid , pantothenic acid , total and pyridoxal fraction of vitamin b6 , folate and total vitamin b12 were estimated in the blood and the cerebrospinal fluid ( csf ) of these patients , and also in the blood of sixty-nine control subjects and in the csf of some of them .
C0034263
pyridoxal
C0087162
vitamin b6