Table 1.
SHM in V36-65 region in hybridomasa
| Control | AID transfected (A) | ||
|---|---|---|---|
| L27 | L25A1 | L27A8 | |
| Mutated sequences/total sequences (%) | 1/24 (4.2%) | 12/26 (46.1%) | 12/23 (52.2%) |
| Mutation frequencyb | 1.1×10−4 | 1.7×10−3 | 1.6×10−3 |
| G:C mutations/total mutations | 1/1 (100%) | 16/16 (100%) | 14/14 (100%) |
| Tsc/total mutations | 1/1 (100%) | 13/16 (81.2%) | 10/14 (71.4%) |
| Hsd/total mutations | 1/1 (100%) | 13/16 (81.2%) | 9/14 (64.3%) |
Hybridomas transfected with AID were grown for 2 months. Heavy-chain V regions were amplified with Pfu polymerase, cloned in pCR blunt TOPO and sequenced. The region sequenced corresponds to 36-65 and is 363 bp long. The consensus sequence is available from Genbank accession no. M19292. Duplicated mutations were scored only once. V regions that shared the same mutation were scored as only one mutated sequence.
Frequency corresponds to mutations per base pair sequenced.
Ts: transition mutations
Hs: hotspots (mutations at G or C nucleotides within RGYW and WRCY).