4.2.1.49	-	
4.2.1.49	hanging-drop vapour-diffusion method, crystallized after removing one of the seven free thiol groups. The crystal structure is solved by multiwavelength anomalous diffraction using a seleno-methionine derivative and then refined at 1.14 A resolution	
4.2.1.49	the enzyme is crystallized in several conditions, with the best crystals obtained with 0.04 M dipotassium hydrogen phosphate, 16.00 % (w/v) polyethylene glycol 8000 and 22.0% (v/v) glycerol. X ray diffraction data are collected to 2.61 A resolution. The crystals belong to the monoclinic space group P21, with unit cell parameters a = 85.12, b = 137.63, c = 117.69 A, beta = 94.69° and are suitable for molecular replacement phasing