ID 5.4.99.17 DE squalene--hopene cyclase. CA squalene = hop-22(29)-ene. CC -!- The enzyme also produces the cyclization product hopan-22-ol by CC addition of water (cf. EC 4.2.1.129). CC -!- Hopene and hopanol are formed at a constant ratio of 5:1. DR B6K412, SHC1_SCHJY ; P33247, SQHC_ALIAD ; P54924, SQHC_BRADU ; DR P55348, SQHC_SINFN ; P33990, SQHC_ZYMMO ; //