Peptide sequence: DDLGHFIPLQ CHGKSDFCWC VDKDGREVQG TRSQPGTTPA CIPTVAPPMV Sequence homology: Cow: 100%; Dog: 100%; Guinea Pig: 100%; Horse: 93%; Human: 100%; Mouse: 93%; Rabbit: 85%; Rat: 100%. Basement membranes, which are composed of type IV collagens,