Table 1.

Numbers of IGHM sequences produced by single-cell PCR.

	Young (10 donors)	Old (10 donors)
Total IGHM sequences*	193	315
Unique IGHM rearrangements#s	186	198
Sequence/clone ratio†	1.04	1.59

^*The numbers represent the total of IGHM sequences that passed quality control with full immunoglobulin V(D)J gene rearrangement.

^#The numbers refer to unique sequences, where only one example per clone is counted. Two sequences were considered part of a clonotype if there was a 100% homology in the CDR-H3.

^†Represents the total number of IGHM sequences of all the young or old donors divided by the number of unique IGHM rearrangements.