IgG H CDR3 fingerprinting after (A) allogeneic BMT (patient no. 1), (B) autologous PBSCT (patient no. 9), and (C) CD34 selected autologous PBSCT (patient no. 11). IgG panV_H, V_H3, and V_H6 H CDR3 fingerprinting profiles were obtained as described in Fig 1 and Materials and Methods. Cγ primers were used instead of Cμ primers to amplify H CDR3s in PCRs. MWs are provided of known basepair size and the corresponding number of encoded aa. The numbers above the lanes indicate the number of weeks when the blood samples were collected posttransplant. Absolute lymphocyte counts at corresponding weeks are as shown in Fig 1. Lanes marked NL show the IgG H CDR3 profiles of a normal donor. IgG H CDR3 repertoire reconstitution was significantly delayed posttransplant. Shown are IgG fingerprinting profiles representative of 11 patients and normal donors of allogeneic BMT recipients.