Table 1. Expression vector mutations are listed under Constructs and the oligonucleotides used are listed under Oligonucleotides column.

Constructs	Oligonucleotides	Sequences
mtsORF	AN1	5′-CCGCGTTCATGCACCGCCTGCTGGCCTGG-3′ (ATG-1 underlined)
	AN2	5′-cagcaggcggtgcatgaacgcggggcc-3′
	AN11	5′-GACGCAGCTTGCCTCCC-3′ (mutated ATG of sORF underlined)
	AN12	5′-CAAGCTGCGTCCCAGGC-3′
	AN5	5′-GCCGCCGCCCGCCGC-3′
	AN6	5′-GGCGGCGGCGGGAGG-3′
	AN7	5′-CTTTAGACC-3′ (stop codon of sORF underlined)
	AN8	5′-CATGGGTCTAAAGGCGGCG-3′
mtAUG-1	Beta-MT35/30-P1	5′-CCGCGGGCCCCGCGTTCTTGCACCGC-3′ (ATG-1 changed to TTG)
	Beta-P30-P	5′-GCTCGTAGTAGAAGTTGG-3′
mtAUG-2	Beta-WT-P	5′-CGGAGCCCGCGGGCCCCGCG-3′
	Beta-MT35/30-P2	5′-AAGTTGGCCACTTCCAAGGGTCTAAAG-3′ (ATG-2 changed to TTG)
AUG-1(K)	Beta-ATG-1K	5′-CAGCGGAGCCCGCGGGCCCCGCGGCCATGGAC CGCCTGC-3′ (Kozak ATG-1 underlined)
	Beta-P30-P	5′-GCTCGTAGTAGAAGTTGG-3′
Spacer112	Beta-BN-P1	5′-GCTTGGATCCTCTAGAGTCCGAGC-3′ (BamHI site underlined)
	Beta-BN-P2	5′-TGATACTAGTCTAAAGGCGGCGCGCGGC-3′ (SpeI site underlined)
	Beta-Spacer112-P1	5′-GGCGGCTAGCCGAGAGACTTCTCGCGGAGCTG-3′ (NheI site underlined)
	Beta-Spacer112-P2	5′-TGAACCATGGGTTCGGTAGGAAAAGGAGCGAGT TTTG-3′ (NcoI site underlined)
sORF(K2)	Beta-WT-P	5′-CGGAGCCCGCGGGCCCCGCG-3′
	ORF(K)-P1	5′-CATGGTGGCTCCCAGGCC-3′ (Kozak ATG of sORF underlined)
	ORF(K)-P2	5′-GGAGCCACCATGGCTCCCGCCG-3′ (Kozak ATG of sORF underlined)
	Beta-P30-P	5′-GCTCGTAGTAGAAGTTGG-3′
sORF(G8)	Beta-WT-P	5′-CGGAGCCCGCGGGCCCCGCG-3′
	ORF(K)-P1	5′-CATGGTGGCTCCCAGGCC-3′ (Kozak ATG of sORF underlined)
	ORF(K)-G-F	5′-GGAGCCACCATGGGCGGCGGTGGCGGCGGTGG CGGCGACTACAAAG-3′ (Kozak ATG of sORF underlined)
	Beta-P30-P	5′-GCTCGTAGTAGAAGTTGG-3′
	ORF(K)-G	5′-AGTTGGCCACTTCCATGGGTCTAGCCGCCACCG CCGCCAC-3′
NewAUG	Beta-WT-P	5′-CGGAGCCCGCGGGCCCCGCG-3′
	NewAUG1	5′-TCTCCGACGCCATGGCCGACGAC-3′
	NewAUG2	5′-GTCGTCGGCCATGGCGTCGGAGA-3′
	Csp-P	5′-GCTTGCAGTCCGCGGG-3′
δ-wt	Delta-F1	5′-CGCCGACTGCCGGGACTACAAAGACGATGACG ATAAATAACG-3′ (Flag tag underlined)
	Delta-F2	5′-CGCGTTATTTATCGTCATCGTCTTTGTAGTCCCGGCAGTCGG-3′
(β-sORFwt)-C/EBPδ or (β-sORFmt)-C/EBPδ	Delta-1	5′-ACGCCGCCATGGGCGCCGCGCTTTTCAGCCTG-3′ (NcoI site underlined)
	Delta-2	5′-CGGCGGCCATGGTGTCAATGTAGGCGCTGAAG-3′