to determine whether suckling affected the levels of microtubules in the anterior pituitary , tubulin levels were measured in groups of lactating rats after they were suckled ( six pups per litter ) for 0 , 5 , 10 , 15 , and 30 min following 4-5 h of nonsuckling .
C0026046
microtubules
C0041348
tubulin