TABLE 5.

Comparison of within-group interspecies ML distances between New World and Old World arenaviruses by t test for equality of means^a

Gene or protein	Distanceb		P value
	NW	OW
NP (nt)	0.633 (0.104)	0.511 (0.049)	<0.001
NP (aa)	0.658 (0.155)	0.424 (0.071)	<0.001
GP1 (nt)	1.10 (0.190)	0.588 (0.105)	<0.001
GP1 (aa)	1.66 (0.415)	0.615 (0.208)	<0.001
GP2 (nt)	0.599 (0.086)	0.434 (0.047)	<0.001
GP2 (aa)	0.595 (0.114)	0.336 (0.073)	<0.001

^aNW, New World; OW, Old World; aa, amino acids. 

^bMean (standard deviation).