| They are precursors of benzoic phenanthridine alkaloids, active ingredients of many medicinal plant extracts. |
| One look at an anhinga's picture should remind you of the reptile precursors of birds! |
| I think we'll find biological precursors that may or may not have been weaponized. |
| Still other proteins are synthesized as inactive precursors called zymogens. |
| On to this Stoker pasted some new-fangled psychiatric theory, derived from the French alienist Charcot, one of Freud's main precursors. |
| Androgenic products, namely androstenedione, are testosterone precursors, and transform to this hormone in the body. |
