Table 2

The number of G protein-coupled receptors predicted in the Rhodopsin families/subfamilies of Ciona in comparison with the human genome

Receptor
Human*
Ciona

Rhodopsin (α)


Prostaglandin
15
2
Amine
40
8
Opsins l
9
3
Melatonin
3
3
MECA
22
5
Unclassified amine
-
6
Unclassified Opsin-like
-
3
Unclassified EDG/CNR-like
-
1
TRE1/GPR84
1
3

Rhodopsin (β)


Peptide
43
9
Unclassified peptide
-
1

Rhodopsin (γ)


SOG
15
1+0+2
MCHR
2
-
Chemokine cluster
42
2
Unclassified Chemokine receptor cluster-like
-
12

Rhodopsin (δ)


MAS
8
-
LGR-like/GLHR
8
2+1
LDLRR
-
15
Unclassified LGR-like
-
14
Purine
42
-
Olfactory
388
-
Other Rhodopsins
23
23

* Numbers and abbreviations are as described in [5, 8].

Kamesh et al. BMC Evolutionary Biology 2008 8:129   doi:10.1186/1471-2148-8-129