ID 5.5.1.31 DE hapalindole H synthase. CA 3-geranyl-3-[(Z)-2-isocyanoethenyl]-1H-indole = hapalindole H. CC -!- The enzyme, characterized from the cyanobacterium Fischerella ambigua CC UTEX 1903, forms the core structure of the hapalindole family of CC alkaloids. CC -!- The enzyme is a heterodimeric complex. //