... consist of < /b> a-< /b> and b- subunits. Each subunit has a < /b> large extracellularregion, a < /b> single transmembrane domain, and a < /b> shortcytoplasmic tail (except for b 4). The < /b> N-terminaldomains of < /b> the < /b> a-< /b> and b- subunits ... enhancescell–cell binding to suppress metastasis. J Biol Chem271, 13811–13815.70 Kitada T, Miyoshi E, Noda K, Higashiyama S, IharaH, Matsuura N, Hayashi N, Kawata S, Matsuzawa Y& Taniguchi ... b- 1,6-GlcNAcbranched tri-antennary and tetra-antennary oligosac-charides in a< /b> 5 b 1[56]. Similarly, characterization of < /b> the< /b> carbohydrate moieties in a< /b> 3 b 1from nonmetastatic andmetastatic human melanoma cell...