uptake of [ 3h ] alanine was inhibited by a 40-fold excess of serine and cysteine ( 53-54 % ) , by meaib and methylalanine ( 26-31 % ) , and by leucine ( 14 % ) , whereas d-alanine , beta-alanine , taurine , and glutamate had no effect .
C0001898
alanine
C0000392
beta-alanine