binding of the antibodies to rat antigens was also demonstrated by immunoelectron microscopy in which the collagen fibers with a typical periodic pattern were labeled positively with rabbit antitype iii procollagen , whereas the amorphous basement membrane material reacted positively with rabbit antitype iv collagen and antilaminin , indicating good , specific cross-reactivity between these antibodies and the rat antigens .
C0004799
basement membrane
C0009333
iv collagen