Hammerhead ribozyme-inhibitor complexes consisting of an RNA ''enzyme'
' strand and a DNA ''inhibitor'' strand have been crystallized in four
different crystal forms. The crystal form that is most attractive for
structure determination diffracts to approximately 3.2 angstrom resol
ution; it is trigonal, space group P3(1)21 or enantiomorph, a = 92.5 a
ngstrom, c = 185.0 angstrom.