Fig. 1From: Active immunization with human interleukin-15 induces neutralizing antibodies in non-human primatesMass spectrum of the intact IL-15 purified from E. coli. Signals corresponding to multi-charged ions are showed for the molecule (B8, B9, B10, B11, B12 and B13) and the myoglobin (A9, A10, A11, A13, A14, A15, A17, A18 and A19) used as an internal standard (Theoretical molecular mass 16951.50 Da)Back to article page