par-3 family cell polarity regulator beta Als2cr19 PAR3beta PAR3L protein coding gene 2010002N16Rik PAR3B O Gene http://identifiers.org/mgd/MGI:1919301 MGI:1919301 Als2cr19|2010002N16Rik|2810455B10Rik|1810008K04Rik|PAR3L|PAR3beta|PAR3B Pard3b 1810008K04Rik 2810455B10Rik genetic mapping +