[Encoded by human IGFBP2 Gene, cysteine-rich high molecular weight secreted 328-aa 35-kD Insulin-Like Growth Factor-Binding Protein 2 precursor contains an IGFBP domain and a thyroglobulin type-I domain. IGF-binding proteins prolong plasma IGF half-life and alter IGF interaction with cell surface receptors. The predominant form in plasma (150-kD) contains IGF-BP53 with apparent molecular mass of 53-kD. IGFBP2 binds IGF-II with high affinity more than IGF-I. (from LocusLink, Swiss-Prot, OMIM, and NCI) ( NCI )] (UMLS (NCI) C0123257) =Amino Acid, Peptide, or Protein; Biologically Active Substance ;