Table 4. Pouched rat olfactory receptor (OR) family expansions and numbers of clustered OR sequences within each expansion.

Expansion	Family	Clusters present (number of sequences represented)
1	101	116 (3 of 4), 154 (4 of 5), 87 (3), 108 (3), 85 (4), 41 (2)
2	101	72 (2), 168 (3 of 7), 139 (3 of 5)
3	101	166 (2 of 7), 111 (1 of 2), 147 (3 of 4), 141 (3 of 12), 16 (4 of 9)
4	101	141 (9 of 12), 151 (1 of 3), 3 (6), 166 (5 of 7), 147 (1 of 4), 16 (5 of 9), 111 (1 of 2), 112 (2)
5	5	52 (2)
6	72	92 (1 of 2)