frequency determinations of lps-reactive cells giving rise to descendants secreting other ig isotypes revealed that , on an average , and irrespective of the origin of the cells , 7 % of all igm-secreting clones switched to the synthesis of igg1 , 39 % to igg2 , 41 % to igg3 and 1 % to iga .
C0007634
cells
C1327616
secreting