primary antibodies used as probes of these tissue compartments were directed against ( 1 ) smooth muscle myosin , ( 2 ) nonmuscle myosin -- components of the cytoplasmic contractile apparatus in smooth muscle and nonmuscle cells , respectively , ( 3 ) laminin , and ( 4 ) fibronectin -- extracellular glycoproteins mediating cell-matrix attachment in smooth muscle and nonmuscle fibroblastic cells , respectively .
C0007634
cells
C0016030
fibroblastic