to identify the factors in lk that serve as second signals for induction of resistance to infection , we exposed macrophages to the following cytokines available as recombinant or highly purified reagents : csf-1 , granulocyte/macrophage colony-stimulating factor ( gm-csf ) , il-1 , -2 , -3 , -4 , and -5 , and ifn-alpha/beta .
C0024432
following
C0015980
ifn