Table 2 Numbers of nonsynonymous (d _N ) and synonymous (d _S ) substitutions per site DPP4 genes in different mammals

Sheep

0.004

0.013

0.280

Killer whale

0.023

0.039

0.595

Cow

0.003

0.016

0.157

Pig

0.027

0.109

0.246

Pacific walrus

0.014

0.053

0.260

Ferret

0.015

0.064

0.235

Cat

0.021

0.081

0.258

Horse

0.016

0.055

0.290

Rhinoceros

0.017

0.044

0.385

Large flying fox

0.005

0.001

3.561

Black flying fox

0.004

0.008

0.487

Common vampire bat

0.042

0.125

0.500

Brandt’s bat

0.006

0.012

0.463

David’s myotis

0.010

0.028

0.380

Little brown bat

0.007

0.007

0.943

Common pipistrelle

0.031

0.066

0.470

Guinea pig

0.018

0.078

0.238

Degu

0.016

0.128

0.122

Lesser Egyptian jerboa

0.023

0.179

0.131

Mouse

0.019

0.093

0.206

Rat

0.027

0.110

0.248

Human

0.001

0.007

0.086

Chimpanzee

0.000

0.002

0.000

Pygmy chimpanzee

0.001

0.000

ND

Gorilla

0.003

0.004

0.863

Orangutan

0.002

0.000

ND

Gibbon

0.003

0.009

0.344

Olive baboon

0.000

0.005

0.000

Rhesus monkey

0.000

0.004

0.000

Galago

0.022

0.149

0.149

Marmoset

0.009

0.053

0.160

American pika

0.036

0.229

0.156