cells of the yeast saccharomyces cerevisiae are normally impermeable to the purine nucleosides adenosine and 5'-deoxy-5'-methylthioadenosine ( mta ) , a product of polyamine biosynthesis . cordycepin-sensitive , adenosine-utilizing strains of s. cerevisiae were able to use mta to fulfill an auxotrophic requirement for purine .
C0034136
purine nucleosides
C0001443
product