The investigation objects are the leaf of the maize sprouts. The aim is to extrast, clean and prove the functioning of the associate consisting of the NADF-malate (decarboxylating) dehydrogenase and enzymes of the Calvin cycle carboxylation phase. Two procedures for enzymating synthesis of the L-malic and labelled according to the carbon (*991*994C) in the fourth position have been developed, and with its use the ability of the associate to perform the "tunnelling" the *991*994C-labelled fragment from malic acid into the phosphoglyceric acid has been demonstrated firstly.Available from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio