stimulation of cell proliferation Transthyretin (TTR) previously known as prealbumin — carries thyroxine (T4) in blood and into cerebral spinal fluid Inter-alpha-trypsin inhibitor heavy chain H2 (ITIH2) – plays a role in pancreas islets and many other cells Periostin – a factor necessary for cell migration (embryonic development, and immune responses) and adhesion of epithelial cells, over-expressed in some cancers Proline rich gla protein 1 (PRRG1 or PRGP1) Proline rich gla protein 2 (PRRG2 or PRGP2) Transmembrane γ-carboxy glutamyl protein 3 (PRRG3 or TMG3, PRGP3) Transmembrane γ-carboxy glutamyl protein 4 (PRRG4 or TMG4, PRGP4) References Protein domains Peripheral membrane proteins