ICRF, Islet cells regeneration factor, Islet of Langerhans regenerating protein, Lithostathine 1 beta, Lithostathine-1-alpha, P19, Pancreatic stone protein 2, Pancreatic stone protein, Pancreatic thread protein, PSP, PSPS, PSPS1, PSPS2, PTP, REG 1 beta, REG, REG-1-alpha, REG1A, REG1A_HUMAN, REG1B, Regenerating islet derived protein 1 beta, Regenerating islet-derived protein 1-alpha, Regenerating protein I alpha, REGL.
Reg protein is stimulated during the regeneration of pancreatic islets. In human, there are four REG family genes, REG 1 alpha, REG 1 beta, REG-related sequence (RS) and HIP/PAP. These Reg-related proteins are classified into four subfamilies according to their amino-acid sequences, but they share a similar structure and physiological function.