Table 1.

Analysis of the best model for each data set of protein alignment based on PROTTEST and running each receptor in MrBayes for 1 million generations under a mixed model.

Receptors used for analysis	Model predicted from PROTTEST/MrBayes	Support (Log likelihood)
SRCR-containing proteins (MARCO, SR-A, SCARA5)	LG + G/WAG + IG	−6950.09
All 5 cA-SRs (MARCO, SCARA3, SCARA4, SCARA5, SR-A)	JTT + G	−82497.07

WAG, Whelan and Goldman model with invariable (I) sites and gamma (G) distributed rates; LG + G, Le and Gascuel model with gamma distributed rates; JTT + G, Jones Thorton and Taylor model with gamma distributed rates.