title: Comment on "Crystal structures of translocator protein (TSPO) and mutant mimic of a human polymorphism".
abstract: Li et al. (Reports, 30 January, p. 555) reported on a crystal structure for a translocator protein (TSPO) from Rhodobacter sphaeroides in which some of the electron density is modeled as a porphyrin. The analysis of the x-ray data discussed here suggests that this assignment is incorrect.
authors.affiliation: Department of Molecular Biophysics and Biochemistry, Yale University, 266 Whitney Avenue, New Haven, CT 06520, USA.
authors.forename: Jimin
authors.initials: J
authors.lastname: Wang
mesh_terms: D001426:Bacterial Proteins / Q000737:chemistry* / Q000378:metabolism*; D006801:Humans; D026901:Membrane Transport Proteins / Q000737:chemistry* / Q000378:metabolism*; D012242:Rhodobacter sphaeroides / Q000737:chemistry*
chemical_list: D001426:Bacterial Proteins; D026901:Membrane Transport Proteins