Figure 1.
Tg schematic. The mIgM heavy chain Tg is depicted. The DNA directing secretion (μs) and the transcription termination site (pAs) have been deleted. VH186.2 is the rearranged heavy chain V(D)J segment. E indicates the heavy chain intronic enhancer. Much of the switch region has been deleted; a small region of residual switch region is indicated.