Wiktionary
phosphopantetheine
n. (context biochemistry English) A derivative of coenzyme A essential to the function of carrier proteins
Wikipedia
Phosphopantetheine
Phosphopantetheine, also known as 4'-Phosphopantetheine, is an essential prosthetic group of acyl carrier protein (ACP) and peptidyl carrier proteins (PCP) and aryl carrier proteins (ArCP) derived from Coenzyme A. It is also present in formyltetrahydrofolate dehydrogenase.