Crystallization of nitrite reductase from Achromobacter cycloclastes.

Crystals of a green copper-containing nitrite reductase from Achromobacter cycloclastes, which diffract to high resolution, belong to the cubic space group P213, with a = b = c = 98.4 A. Crystals of a nitrite reductase from Alcaligenes faecalis S-6 have been made, and belong to space group P212121, with a = 77.3 A, b = 94.6 A and c = 141 A. Crystals of the blue copper protein from Ac. cycloclastes have also been obtained: these belong to space group P21212, with cell dimensions a = 34.9 A, b = 91.1 A and c = 36.7 A (1 A = 0.1 nm).