in the secondary response , the intracellular antibody positivity disappeared immediately after the antigenic rechallenge but reappeared from 6 hours later in the large germinal center cells which further transformed from 48 to 72 hours into the `` '' specifically differentiated '' '' medium-sized germinal center cells that disappeared by 96 hours after the secondary injection to enter the thoracic duct .
C0007589
differentiate
C0007634
cel