A case of mistaken identity: The MAR-1 antibody to mouse FcεRIα cross-reacts with FcγRI and FcγRIV

This study demonstrates that the MAR-1 antibody to mouse FcepsilonRI unexpectedly binds to two Fcgamma receptors, raising concerns regarding numerous studies that used this antibody to assess the distribution and function of FcepsilonRI+ cells.