This family of proteins binds to insulin-like growth factor binding protein 2 (IGFBP-2) and inhibits the invasion of glioma cells [1].

1: IIp45, an insulin-like growth factor binding protein 2 (IGFBP-2) binding protein, antagonizes IGFBP-2 stimulation of glioma cell invasion. Song SW, Fuller GN, Khan A, Kong S, Shen W, Taylor E, Ramdas L, Lang FF, Zhang W; Proc Natl Acad Sci U S A. 2003;100:13970-13975. PMID:14617774