The function of Ensembl gene identifier ENSG00000163909 (HEYL, hes related family bHLH transcription factor with YRPW motif like) is as follows. Downstream effector of Notch signaling which may be required for cardiovascular development (By similarity). Transcriptional repressor which binds preferentially to the canonical E box sequence 5'-CACGTG-3' (By similarity). Represses transcription by the cardiac transcriptional activators GATA4 and GATA6. {ECO:0000250, ECO:0000269|PubMed:15485867}.