SOME PROBLEMS IN THE BIOACTIVITY ASSAY FOR GLUCOSE TOLERANCE FACTOR

摘要

According to the previous reports, chromium (Ⅲ) was regarded as the essential component of glucose tolerance factor (GTF) and saccharomyces cerevisiae was one of the richest sources of GTF. It was discovered by Mertz (Phys. Rev., 49(1967)) and confirmed by Miesky (Inorg. Biochem., 13(1980)) and Haylock (Exp. Mycol.,