a dose-dependent enhancement of the primary response to srbc was also observed when il-1 beta or its peptide fragment were injected intravenously ( i.v . ) together with the antigen , with a maximum activity at 10 micrograms/kg for the 163-171 peptide and 100 pg/kg for hu ril-1 beta .
C0030935
peptide fragment
C0030956
peptide