[biological_process] enteroendocrine cell differentiation <sep> positive regulation of proteasomal ubiquitin-dependent protein catabolic process <sep> proteasome-mediated ubiquitin-dependent protein catabolic process <sep> protein ubiquitination <sep> regulation of R7 cell differentiation <sep> sensory organ development <sep> sevenless signaling pathway <sep> ubiquitin-dependent protein catabolic process <sep> visual perception