Fig. 2.

Structure of mouse AsterA (GramD1a) with four bound 25-hydroxy-cholesterol molecules (PDB accession number 6GQF). The crystal structure of the protein (blue ribbon) and sterol molecules (green ball-and-stick rendering, oxygen in red) was obtained by X-ray crystallography at 2.9 Å resolution [118]. Molecular coordinates were downloaded from the PDB data bank and structures produced using the CCP4MG Molecular Graphics Program of the University of York, U.K. [121].