the residual 7-oh-mtx tetraglutamate remained bound to a site with a molecular weight of approximately 25,000 to 35,000 as assessed by bio-gel p-60 analysis and could not be displaced by folic acid , 5-formyltetrahydrofolate , 7-oh-mtx , or the tetraglutamate of mtx .
C0016410
folic acid
C0023413
5-formyltetrahydrofolate