| X-RAY DIFFRACTION |
8 |
277 |
Crystallization trials were performed under CO atmosphere. The dialysis technique was used to obtain protein crystals: the protein, in a 50 mM Tris pH 8.0 buffer with 2mM dithionite, with a concentration of 5 mg x ml-1, was separated by the precipitant reservoir (2.0 M ammonium sulphate, 2 mM dithionite) via a dialysis membrane with a 8000 Da cutoff. Single crystals of the carbomonoxylated Hb1Tn (Hb1TnCO), suitable for X-ray diffraction, were grown in a week (size 0,2 x 0,2 x 0,1 mm3). |