A progenitor cell that is able to differentiate into the pancreas alpha, beta and delta endocrine cells. This cell type expresses neurogenin-3 and Isl-1. [ http://www.ncbi.nlm.nih.gov/pubmed/20025937 http://www.ncbi.nlm.nih.gov/pubmed/22728667 http://www.ncbi.nlm.nih.gov/pubmed/20217494 ]