CHF2 Herp2 Hey1 genetic mapping hesr-1 http://identifiers.org/mgd/MGI:1341800 bHLHb31 protein coding gene Hesr1 - Gene Hesr1|CHF2|bHLHb31|Herp2|hesr-1|HRT1 O hairy/enhancer-of-split related with YRPW motif 1 MGI:1341800 HRT1