[biological_process] cellular senescence <sep> circadian behavior <sep> DNA damage response <sep> entrainment of circadian clock by photoperiod <sep> negative regulation of cell growth <sep> negative regulation of DNA-templated transcription <sep> nucleotide-excision repair <sep> oligodendrocyte apoptotic process <sep> positive regulation of apoptotic process <sep> positive regulation of transcription by RNA polymerase II <sep> protein tetramerization