the method can detect as little as 25 pg mma in small volumes of urine , plasma and other body fluids or tissue homogenates , has potential for the simultaneous estimation of mma , other organic acids , methylmalonyl coenzyme a and creatinine and should be of particular value in the investigation of occult cobalamin deficiency or suspected errors of vitamin b12 or intermediary metabolism .
C0042847
of
C0042845
vitamin b12