upon addition of il-2 , cellular levels of biopterin and 6-hydroxymethylpterin rise transiently from 0.02 to 0.9 pmol/10 ( 6 ) cells , cellular levels of neopterin from 1.5 to 4.1 pmol/10 ( 6 ) cells .
C0005562
biopterin
C0068527
neopterin