Table 1.

The 3' codon context of CUG

3' Codon	Residual	3' Codon	Residual	3' Codon	Residual	3' Codon	Residual
AAA	7.436	ACG	0.644	UCU	-10.007	CCA	-2.438
AAG	1.927	CGU	-1.809	CUU	1.167	CCG	2.895
AAU	0.397	CGC	2.981	CUC	2.18	CAU	2.026
AAC	2.037	CGA	8.258	CUA	5.258	CAC	2.642
ACU	-6.947	CGG	5.404	CUG	6.774	CAA	4.049
ACC	-5.239	ACG	-4.726	CCU	-1.769	CAG	7.105
ACA	-5.12	AGG	-0.666	CCC	8.894	UAA	0.22

Positive values indicate that the 3' codons appear in the genome more times than expected (good context) while negative values indicate that the 3' codons appear fewer times than expected assuming a random distribution (bad context). Residual values give a quantitative indication of the context bias, where values falling within the -3 to +3 interval are not statistically significant (no bias). See also Figure 2.