these antibodies did not cross-react with either known basement membrane components ( laminin , type iv collagen , and heparan sulfate proteoglycan ) , with 70k `` '' culture shock '' '' protein or with components of normal mouse serum ( including mouse transferrin , albumin , or alpha-fetoprotein ) , when analyzed by `` '' western '' '' immunoblots .
C0004799
basement membrane
C0022984
laminin