in an attempt to clarify this , three methods have been used to assess the relative efficacy of vitamin b12 ( hydroxocobalamin ) and various folate analogues in titrated concentrations at correcting 'de novo ' thymidylate synthesis by megaloblastic human marrow cells : ( 1 ) the deoxyuridine ( du ) suppression test which analyses the reduction in ( 3h ) -thymidine labeling of dna by unlabeled du .
C0042845
vitamin b12
C0020316
hydroxocobalamin