transport inward of 5-deazaaminopterin in isolated crypt cell epithelium from mouse small intestine was 2-fold lower than aminopterin ( influx km = 14.2 +/- 2 microm ) , while influx of 5-deazamethotrexate was 2-fold greater than methotrexate ( influx km = 98.6 +/- 23 ) .
C0002583
aminopterin
C0025677
methotrexate