Table 4.

Association between codon optimality and mRNA synthesis rates

	cTE				nTE
	Total	Observed	Expected	P value	Total	Observed	Expected	P value
S. cerevisiae
Cramer (1)	23	23	9.0	3.5e-13	23	20	11.3	1.5e-05
Cramer (2)	22	17	8.7	1.9e-05	22	16	10.8	1.3e-02
Gresham	23	22	9.0	1.7e-11	23	19	11.3	1.5e-04
S. pombe
Bahler	27	25	12.4	3.8e-10	27	23	15.5	2.6e-04
Mata (5)	21	18	9.6	2.1e-05	21	18	12.0	3.0e-03
Gagneur	26	24	11.9	1.9e-09	26	22	14.9	5.7e-04

Total numbers of codons with positive CPC values (“Total”) among 61 codons, observed numbers of optimal codons with positive CPC values (“Observed”), expected numbers of optimal codons with positive CPC values (“Expected”), and P values from chi-square tests