mtap+

4-Methyl-2-oxopentanoic acid is an abnormal metabolite, a neurotoxin and a metabolic toxin.

L-Alanosine, an antibiotic isolated from the fermentation product of Streptomyces alanosinicus, inhibits tumor cell proliferation by blocking the adenylosuccinate synthetic pathway through the inhibition of adenylosuccinate synthetase and Methylthioadenosine phosphorylase.