RENIN

Yes. "RENIN" is in the ENABLE word list, accepted by Words With Friends and most open Scrabble apps. It scores 5 points in Scrabble and 7 points in Words With Friends.

In Scrabble, "RENIN" is worth 5 points before bonuses. In Words With Friends, it's worth 7 points. Played on a triple-word-score, the Scrabble value becomes 15.

A circulating enzyme released by mammalian kidneys that converts angiotensinogen to angiotensin-I. Because its activity ultimately leads to formation of angiotensin-II and aldosterone, this hormone plays a role in maintaining blood pressure.

1 anagram can be formed using the same letters as RENIN: INNER.