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Table 5 Putative optimal codons

From: Mutational pressure dictates synonymous codon usage in freshwater unicellular α - cyanobacterial descendant Paulinella chromatophora and β - cyanobacterium Synechococcus elongatus PCC6301

*Paulinella chromatophora*					*Synechococcus elongatus*
AA	Codon		AA	Codon		AA	Codon		AA	Codon
Phe	TTT	**	Tyr	TAT	**	Phe	TTT		Tyr	TAT
	TTC			TAC			TTC	**		TAC	**
Leu	TTA	**	TER^a	TAA		Leu	TTA		TER^a	TAA
	TTG			TAG			TTG			TAG
	CTT		His	CAT	**		CTT		His	CAT
	CTC			CAC			CTC			CAC	**
	CTA		Gln	CAA	**		CTA		Gln	CAA
	CTG			CAG			CTG	**		CAG
Ile	ATC		Asn	AAT	**	Ile	ATC	**	Asn	AAT
Ile	ATT			AAC			ATT			AAC
	ATA	**	Lys	AAA	**		ATA		Lys	AAA
Met	ATG			AAG		Met	ATG			AAG
Val	GTT		Asp	GAT	**	Val	GTT		Asp	GAT
	GTC			GAC			GTC			GAC	**
	GTA		Glu	GAA	**		GTA		Glu	GAA
	GTG			GAG			GTG	**		GAG
Ser	TCT		Cys	TGT	**	Ser	TCT		Cys	TGT
	TCC			TGC			TCC			TGC	**
	TCA	**	TER	TGA			TCA		TER	TGA
	TCG		Trp	TGG			TCG	**	Trp	TGG
Pro	CCT		Arg	CGT		Pro	CCT		Arg	CGT
	CCC			CGC			CCC			CGC	**
	CCA	**		CGA			CCA			CGA
	CCG			CGG			CCG	**		CGG
Thr	ACT		Ser	AGT		Thr	ACT		Ser	AGT
	ACC			AGC			ACC			AGC
	ACA	**	Arg	AGA			ACA		Arg	AGA
	ACG			AGG			ACG	**		AGG
Ala	GCT		Gly	GGT		Ala	GCT		Gly	GGT
	GCC			GGC			GCC	**		GGC	**
	GCA	**		GGA	**		GCA			GGA
	GCG			GGG			GCG			GGG

Putative optimal codons in P. chromatophora and S. elongatus.
**Putative optimal codons.
^aCanonical stop codons excluded from the analysis.
Figures are significant at p ≤ 0.001 (one tailed).

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