the authors have defined the specificity of monoclonal antibodies to collagen fragments of basement membrane ( bm ) and have used these highly specific antibodies to study the human tissue distribution of two novel 28 kd noncollagenous ( nc1 ) peptides ( m28 , m28+ ) compared with those derived from type iv collagen ( alpha 1 [ 26 kd ] and alpha 2 [ 24 kd ] nc1 ) .
C0009325
collagen
C0009333
type