further , the eba antigen is absent from serum and blood components , placenta , amnion , lung , and the ehs tumor , a murine sarcoma that produces large amounts of laminin , type iv collagen , nidogen , entactin , and basement membrane proteoglycan but is present in cutaneous tumors of adnexal and epithelial origin .
C0009333
type iv
C0004799
basement membrane