LEO1	Left open reading frame 1
ΔLEO1	gene deletion of LEO1
WT	wild type
PAF1C	RNA polymerase II associated factor 1 complex
HES1	Hairy and Enhancer of Split-1
CRISPR	Clustered regularly interspaced short palindromic repeats
H3K9	histone H3 lysine 9
BJ-5ta	hTERT-immortalized fibroblasts cell line
FBS	fetal bovine serum
ChIP	Chromatin immunoprecipitation
FACS	Fluorescence-activated cell sorting
ERCC	External RNA Controls Consortium
MTT	(3-(4,5-dimethylthiazol-2-yl)-2,5 diphenyl tetrazolium bromide)
ERK1/ERK2	Extracellular signal-regulated kinase 1/2
Wnt	Wingless and Int-1
TSS	Transcription start site