Table 2 Base distribution of somatic mutations in CDR AGY Ser codons. Immunogen AGY (%) AGY (%) AGY (%) 2 changes (%) 3 changes (%) Influenzaa 12 53 11 20 4 Influenzab 11 52 15 20 2 West Nile 0 80 20 0 0 Dengue 15 57 14 14 0 Rhinovirus 0 22 19 52 7 Avian Influenza 0 67 33 0 0 Hep. A, B, and C 12 35 18 35 0 aAntibody sequences from Wrammert et al. (23). bAntibody sequences from Li et al. (24).