2.1.1.270 crystallized from a polyethylene glycol precipitant containing 2.5 mM of the reaction product S-adenosyl-L-homocysteine, 2.5 A resolution 713268 2.1.1.270 homology modeling of the active sites of both HMM1 and HMM2 with substrate (+)-6a-hydroxymaackiain 676377