Lack of Variation in S-Adenosyl L-Homocysteine Hydrolase (SAHH) Phenotype among Japanese

Variation of a red cell enzyme, S-adenosyl L-homocysteine hydrolase (SAHH) was surveyed among 640 Japanese individuals from four different localities.According to the typing after starch gel electrophoresis, all samples were SAHH 1 and no variant could be detected. These results were inconsistent with those of AKIYAMA et al. (1984), who reported polymorphism of the enzyme among Japanese.Control testing using Caucasian samples and panel red cells obtained from the USA, however, indicated that variant types were detectable and that the typing proceduresused in the present study was appropriate.