- Expression of PTP35, the murine homologue of the protein tyrosine phosphatase-related sequence IA-2, is regulated during cell growth and stimulated by mitogens in 3T3 fibroblasts. Magistrelli, G., Covini, N., Mosca, M., Lippoli, G., Isacchi, A. Biochem. Biophys. Res. Commun. (1995)