Table 1.

Chemosensory Receptor Repertoire Sizes

Gene Family	No. of Genes in Catshark	No. of Genes in Elephant Shark	No. of Genes in Mouse	No. of Genes in Zebrafish
OR	8 (1)^b	7^a	1037^c	154^c
TAAR	5^b	5^a	15^d	112^d
ORA/V1R	6^b	4^a	211^c	7^e
V2R	35^b	34^a	121^c	58^f
V2RL	5^b	3^a	0	2^f
TAS1R	6^b	4^a	3^c	4^g
T2R	0^b	0	33^c	4^c

Note.—Total gene numbers are given, in parentheses the number of pseudogenes.

Additional genes identified (elephant shark, three TAAR, four TAS1R, one OR, two V2R, two V2RL) compared with previously published numbers (Niimura 2009b; Venkatesh et al. 2014).

Refer to genes newly identified here (catshark). Superscripts refer to

Niimura (2009a).

Hussain et al. (2009).

Saraiva and Korsching (2007).

Ahuja et al. (2018).

Alioto and Ngai (2006).