Table 2 Candidate genes with annotations from the Swiss-Prot on NR database (with examples of candidate gene studies).

Non-visual opsins[59–61]

Kallikrein-8; AltName: Neuropsin;

O88780.1

1

SP

6e-16

93%

Kallikrein-8; Short = mK8; AltName: Neuropsin

Q61955.1

1

SP

2e-12

81%

Melanopsin-like; AltName: Opsin-4-like

Q1JPS6.1

1

SP

8e-43

23%

Visual opsins

Green-sensitive opsin-1; AltName: Green cone

P32311.1

12

SP

6e-87

60%

Rhodopsin

P79756.1

1

SP

e-172

65%

Rhodopsin

P79848.1

183

SP

e-64

65%

Blue-sensitive opsin; AltName: Blue cone

P87365.1

4

SP

e-154

66%

Green-sensitive opsin; AltName: Green cone

P87366.1

13

SP

9e-108

79%

Green-sensitive opsin-4; AltName: Green cone

Q9W6A6.2

2

SP

3e-61

32%

Red-sensitive opsin; AltName: Red cone

P87367.1

6

SP

1e-76

75%

Putative violet-sensitive opsin; AltName: Violet

P87368.1

12

SP

2e-85

80%

MHC class I [62, 63]

Mhc, class IA

CAA90790.1

2

NR

5e-100

20%

Mhc, class IA

CAA90793.1

1

NR

6e-27

55%

Mhc, class 1b

CAA90782.1

1

NR

3e-16

31%

classical MHC class I antigen

ACN49159.1

1

NR

1e-04

9%

classical MHC class I antigen

ACN49175.1

1

NR

3e-11

26%

MHC class I related gene

O19477.2

5

SP

4e-8

21%

MHC class I related gene

Q5RD09.1

1

SP

8e-14

51%

MHC class I receptor

AAY79253.1

1

NR

5e-15

31%

MHC class II

MHC class II alpha subunit

AAO19852.1

1

NR

1e-8

12%

MHC class II antigen

AAP20186.1

1

NR

1e-10

17%

MHC II invariant chain

AAS77256.1

1

NR

5e-22

31%

MHC class II antigen beta chain

ABX44766.1

1

NR

2e-7

30%

MHC class II antigen

ACN72667

1

NR

9e-15

41%

HLA class II histocompatibility antigen, DRB1-8 beta

Q30134.2

2

SP

2e-7

50%

Behaviour Genes [64–67]Dopamine receptors

D(4) dopamine receptor; AltName: Dopamine D4

P21917.2

1

SP

2e-22

15%

D(2)-like dopamine receptor

P53453.1

2

SP

4e-61

28%

Immediate early genes (and related genes)

Early growth response protein 1

P26632.2

1

SP

2e-42

24%

Target of EGR1 protein 1

Q17QN2.1

1

SP

6e-20

37%

Target of EGR1 protein 1

Q96GM8.1

1

SP

1e-76

38%

Proto-oncogene protein c-fos

P53450.1

3

SP

8e-30

37%

c-FosLb protein

CAD56866.1

1

NR

9e-11

14%

Pigment genes [68]Melanin synthesis

D-dopachrome decarboxylase-A

Q68FI3.1

1

SP

1e-33

100%

Melanocyte protein Pmel 17; AltName: Silver

Q98917.3

11

SP

9e-15

14%

L-dopachrome tautomerase

O93505.1

2

SP

5e-57

29%

Melanocyte-stimulating hormone receptor

P55167.1

1

SP

2e-36

36%

Pteridine synthesis

Dihydropteridine reductase; AltName: HDHPR

P09417.2

2

SP

5e-57

74%

Pterin-4-alpha-carbinolamine dehydratase

Q91901.3

4

SP

1e-14

52%

Pterin-4-alpha-carbinolamine dehydratase 2

Q9CZL5.2

1

SP

2e-40

76%

Putative pterin-4-alpha-carbinolamine dehydratase

Q9TZH6.3

1

SP

5e-41

58%