PT - JOURNAL ARTICLE AU - Michael Winklhofer AU - Henrik Mouritsen TI - A room-temperature ferrimagnet made of metallo-proteins? AID - 10.1101/094607 DP - 2016 Jan 01 TA - bioRxiv PG - 094607 4099 - http://biorxiv.org/content/early/2016/12/15/094607.short 4100 - http://biorxiv.org/content/early/2016/12/15/094607.full 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.