Hypercholanemia, Familial, 2, also known as ntcp deficiency, is related to cholestasis and obstructive jaundice. An important gene associated with Hypercholanemia, Familial, 2 is SLC10A1 (Solute Carrier Family 10 Member 1). Affiliated tissues include liver and bone, and related phenotypes are low levels of vitamin d and prolonged neonatal jaundice