Table 2.

Testing for common ancestry of E6 and E7 on reduced dataset 1. The test was performed using the software Bali-Phy on the concatenated E6 and E7 amino acid sequences as well as on E6 and E7 separately. The log marginal likelihoods (P(data|M)) are indicated for the Common Ancestry (CA) model (H0) and the alternative Independent Origin (IO) models (H1–H7). The Bayes factor for CA is calculated as ΔBF = log [Prob(CA)] − log [Prob(IO)], such that positive values favour CA and negative values indicate IO.

	E6E7		E6		E7
model	P(data|M)	ΔBF	P(data|M)	ΔBF	P(data|M)	ΔBF
H0: (grey-blue-yellow-red-black-green)	−19083.055	0	−10960.151	0	−8239.297	0
H1: grey+(blue-yellow-red-black-green)	−19425.259	342.204	−11008.514	48.363	−8300.605	61.308
H2: grey+blue+(yellow-red-black-green)	−19595.075	512.020	−11102.586	142.435	−8391.373	152.076
H3: grey+blue+yellow+(red-black-green)	−19883.098	800.043	−11266.682	306.531	−8515.244	275.947
H4: grey+blue+yellow+red+(black-green)	−20108.285	1025.230	−11390.535	430.384	−8644.525	405.228
H5: grey+blue+(red-black)+(green-yellow)	−19850.013	766.958	−11239.646	279.495	−8541.050	301.753
H6: grey+blue+red+black+(green-yellow)	−22355.489	3272.434	−11352.869	392.718	−8638.945	399.648
H7: grey+blue+yellow+red+black+green	−20317.714	1234.659	−11503.409	543.258	−8748.908	509.611