Epsilon cell Epsilon cell Epsilon cells (ε-cells) are endocrine cells found in the Islets of Langerhans and produce the hormone ghrelin. They were discovered in mice. In human fetal pancreases, single epsilon cells scattered in primitive exocrine tissue were observed to start aggregating into clusters after gestational week 13. From gestational week 21, epsilon cells were observed around developing islets, forming an almost continuous layer at the rim of the islets. In adult pancreas samples, they remained localized on the mantle of the islets in different amounts. Production of ghrelin with insulin, glucagon, or somatostatin was not detected during development. Co-production with
Ryan Langerhans again selected to the All-State team. That season, Langerhans also won 11 games as a pitcher. During his senior season in 1998, Langerhans batted .512, was named to the All-State team, was selected as a Nike All-American, was selected to play in the 1998 Texas High School All-Star Game, and was named Texas Player of the Year. Langerhans is one of five players who attended Round Rock High School and have played in the major leagues. The four other players are John Danks, Brian Gordon, Jordan Danks and Travis Schlichting. Ryan Langerhans's father, John Langerhans, was his coach while playing