to investigate the nature of the precursor cells ( cfu-ml ) which form colonies on cams , we pre-treated marrow cells with rabbit anti-mouse brain serum ( rambs ) , a known anti-pluripotent stem cell ( cfu-s ) serum , plus complement ( c ) and studied the number of colonies formed and the distribution of their sizes among the various histological types .
C0229671
serum
C0009498
complement