furthermore , cells which were resistant to methotrexate ( mtx : 0.5 microm ) secreted r-edf up to 1 microgram/ml . r-edf was identical to natural edf ( n-edf ) produced by human acute monocytic leukemia cell line , thp-1 , as regards its dimeric structure and a biological activity .
C0007634
cells
C1327616
secreted