the relative level of ria-detectable alpha tgfs in the cm from the breast cancer cell lines mcf-7 , zr-75-1 , t47-d , and mda-mb-231 , and from the cm of primary cultures of human mammary epithelial cells , ranged from 0.02 to 0.85 ng/ml .
C0006142
breast
C0006141
mammary