bm macrophages ( bmm phi ) grown in l929 cell supernatant as a crude source of macrophage colony-stimulating factor ( m-csf ) as well as bm cells propagated in the presence of recombinant m-csf exhibited transient antigen presentation potential to some t cell clones , being maximal on day 7 and having declined to a low level by day 19 of in vitro culture .
C0005953
bm
C0005955
bm cells