[Demonstration of nucleotide pyrophosphatase and phosphohydrolase activities in normal lymphocyte of Balb/c mice and absence of these activities in YC8 tumor cells and in lymphocytes of animals with YC8 lymphoma].

Saline extraction of tumor cells from YC8 lymphoma transplanted in Balb/c Mice, of lymphocytes from animals bearing this tumor and of lymphocytes from control animals, allowed us to show important hydrolytic activities towards UDP-[(14C)]-galactose and galactose-[(14C)]-1-phosphate in normal lymphocytes. These activities disappear in lymphocytes from Mice bearing this tumor and in tumor cells themselves.