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Crystals of the tetra-heme cytochrome c3 (Mr = 13 kDa, 107 residues, four heme groups) from sulfate- and nitrate-reducing Desulfovibrio desulfuricans ATCC 27774 have been obtained and crystallographically characterized. They belong to space group P6122 with cell dimensions a = b = 61.84 (4) and c...
Putrescine is the immediate precursor for the synthesis of polyamines and is normally generated by the action of ornithine decarboxylase. However, putrescine can also be produced by the conversion of arginine to agmatine by arginine decarboxylase (bADC) followed by the release of urea by agmatine...
A recently reported method - the improved condensing protocol Subbiah (1991). Science, 252, 128-133; (1993). Acta Cryst. D49, 108-119 - for obtaining low-resolution macromolecular envelopes is applied to five varied test cases. These examples were chosen to illustrate the general applicability of...