Mucin MUC1 is seen in cell surface protrusions together with ezrin in immunoelectron tomography and is concentrated at tips of filopodial protrusions in MCF-7 breast carcinoma cells. - Bennett,R.; Jarvela,T.; Engelhardt,P.; Kostamovaara,L.; Sparks,P.; Carpen,O.; Turunen,O.; Vaheri,A. (J Histochem Cytochem, 2001)