RT Journal Article SR Electronic T1 A room-temperature ferrimagnet made of metallo-proteins? JF bioRxiv FD Cold Spring Harbor Laboratory SP 094607 DO 10.1101/094607 A1 Michael Winklhofer A1 Henrik Mouritsen YR 2016 UL http://biorxiv.org/content/early/2016/12/15/094607.abstract AB Qin et al. (A magnetic protein compass, Nature Materials 15, 217-226, 2016) claim that "MagR is the first known protein that carries an intrinsic magnetic moment at ambient temperature". We show here that the claim must, unfortunately, be fundamentally wrong.