Vol. 166, No. 3, August 2, 2004. Pages 407–418.

During the production of this article, a typographical error was introduced to the Abstract. The term “phosphatase” was mistakenly published as “phosphate.” The corrected sentence is printed below.

Evidence is provided that the β1 cytodomain plays an important role in mediating β1 integrin association with either IRS-1 or Grb2-associated binder1 (Gab1)/SH2-containing protein-tyrosine phosphatase 2 (Shp2), downstream effectors of IGF-IR: specifically, β1A associates with IRS-1 and β1C with Gab1/Shp2.