Table 2 Predicted sources of the β-CA genes. The tentative prokaryotic endosymbionts and their hosts are listed

A

Cesiribacter andamanensis (M7MX87)

Bacteroidetes

Acanthamoeba castellanii (L8GR38) (Fig. 2a)

A

Leptospira kirschneri (M6X652)

Spirochaetes

Naegleria gruberi (Predicted 1, 2, 3)

Paramecium tetraurelia (A0BD61, A0CEX6, A0C922, A0BDB1, A0E8I0) (Fig. 2a)

A

Colwellia psychrerythraea (Q47YG3)

Gammaproteobacteria

Ichthyophthirius multifiliis (G0QYZ1, G0QPN9)

Tetrahymena thermophila (Q22U21, Q22U16, I7M0M0, I7M748, I7LWM1, I7MDL7, Q23AV1, I7MD92)

Dictyostelium spp (Q555A3, Q55BU2, Q94473, F0Z7L1, F4PL43) (Fig. 2a)

A

Magnetospirillum magneticum (Q2VZD0)

Alphaproteobacteria

Angomonas daenei (S9WXX9)

Strigominas culicis (S9TM82)

Leishmania spp (A4H4M7 as predicted, E9B8S3, A4HSV2, Q4QJ17, E9AKU0, S0CTX5) (Fig. 2a)

B

Myxococcales

Deltaproteobacteria

Insects and nematodes (F1LE18, G4V6B2, Q22460, Q5TU56, Q17N64, Q9VHJ5) (Fig. 2b)

C

Vesicomyosocius okutanii (A5CVM8)

Gammaproteobacteria

Entamoeba spp (B0E7M0, 1C4LXK3, K2GQM0) (Fig. 2c)

C

Afipia felis (K8NQ88)

Alphaproteobacteria

Acanthamoeba castellanii (L8GLS7) (Fig. 2c)

Bradyrhizobium japonicum (G7D846)

D

Selenomonas ruminantium (I0GLW8)

Firmicutes

Trichomonas vaginalis (A2ENQ8, A2DLG4) (Fig. 2d)

Veillonella spp (F9N508)