Table 1: Amplification rates of antigen-specific T cells on irradiated allogeneic feeder cells.

PeptideNumber of
sorted specific cells
Final number of
amplified specific cells
Amplification factor1Average number of
cell divisions

Melan-AA27L105 116010
4 307511
86010
260011
105 138010

200011
105 197011
3258
562512
90010

Amplification factors are estimated from the final number of amplified T cells divided by the number of rosetted T cells seeded on feeder cells.