Najmudin, ShabirBonifácio, CecíliaDuarte, Américo G.Pualeta, Sofia R.Moura, IsabelMoura, José J. G.Romão, Maria J.2012-02-092012-02-0920091744-3091http://hdl.handle.net/10362/6989Acta Crystallographica Section F Structural Biology and Crystallization Communications Volume 65, Part 8The orange-coloured protein (ORP) from Desulfovibrio gigas is a 12 kDa protein that contains a novel mixed-metal sulfide cluster of the type [S2MoS2-CuS2MoS2]. Diffracting crystals of the apo form of ORP have been obtained. Data have been collected for the apo form of ORP to 2.25 A ° resolution in-house and to beyond 2.0 A ° resolution at ESRF, Grenoble. The crystals belonged to a trigonal space group, with unit-cell parameters a = 43, b = 43, c = 106 A ° .engjournal article