From: Analysis of substitution rates showed that TLR5 is evolving at different rates among mammalian groups
Model
ω ratios
M0
one ratio: ω0 = ωL = ωR = ωCH = ωCA = ωP = ωE
M2
two ratio: ω0 = ωP = ωE, ωL = ωR = ωCH = ωCA
M5
five ratio: ω0 = ωP = ωE, ωL, ωR, ωCH, ωCA
M7
seven ratio: ω0, ωP, ωE, ωL, ωR, ωCH, ωCA