to better understand the possible roles and interactions of transforming growth factor-alpha ( tgf alpha ) and its receptor , the epidermal growth factor ( egf ) receptor in human breast epithelium , we have studied the expression of tgf alpha and the egf receptor in a series of normal human mammary epithelial cells derived from reduction mammoplasty before in vitro propagation , during short term proliferation in vitro , and after immortalization .
C0006141
mammary
C0191922
reduction mammoplasty