Table 2. Constituent proteins of the ectoplasmic specialization in the testis^*

Protein Mr (kd) Interacting partners References Actin 40 espin, -actinin, vinculin, gelsolin, keap1 Grove and Vogl, 1989 -Actinin 100 actin Russell and Goh, 1988 espin 110 actin Bartles et al, 1996 6ß1 Integrin 300 ILK Palombi et al, 1992; Salanova et al, 1995 Vinculin 130 actin Grove et al, 1990 Fimbrin 68 n.k. Grove and Vogl, 1989 Myosin Vlla 210 keap1 Hasson et al, 1997 ILK 50 ß1 integrin Mulholland et al, 2001 FAK 125 6ß1 integrin Siu et al, 2002 Gelsolin 93 actin, PIP2 Guttman et al, 2002 Keap 1 63 actin, myosin Vlla Velichkova et al, 2002 PLC 148 n.k. Guttman et al, 2002 *ILK indicates integrin-linked kinase; FAK, focal adhesion kinase; PIP2, phosphatidylinositol 4,5-bisphospate; PLC, phosphoinositide-specific phospholipase C.; n.k., not known.