Table 2. Results of fitting the linear regression model in Equation 3 to codon usage in ssDNA Enterobacteria phages parasitizing E. coli, with viral genome accession number (ACCN), viral genome length (L), number of viral genes (N_g), the estimated intercept (B_C→T) and slope (b), the Pearson correlation between P_U and φ for each phage species, and the statistical significance (two-tailed P) of the relationship.

Phage	ACCN	L	Ng	BC→T	b	R	P
Phage alpha3	NC_001330	6087	10	0.7022	0.3790	0.3936	0.1315
Phage G4	NC_001420	5577	11	0.5707	0.6609	0.5912	0.0159
Phage ID18	NC_007856	5486	11	0.5876	0.6551	0.5105	0.0433
Phage ID2	NC_007817	5486	11	0.5443	0.5820	0.5055	0.0458
Phage phiX174	NC_001422	5386	11	0.6965	0.2840	0.2969	0.2641
Phage St-1	NC_012868	6094	11	0.6881	0.2895	0.3048	0.2511
Phage WA13	NC_007821	6068	10	0.7122	0.2190	0.2354	0.3801
Phage I2-2	NC_001332	6744	9	0.6987	0.3301	0.2649	0.3214
Phage If1	NC_001954	8454	10	0.6551	−0.0763	−0.0819	0.7629
Phage Ike	NC_002014	6883	10	0.7419	0.1614	0.1097	0.6858
Phage M13	NC_003287	6407	10	0.7390	0.1717	0.1899	0.4812