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Table 5 Differences in the frequencies of functional olfactory receptor genes among different species

From: The complete swine olfactory subgenome: expansion of the olfactory gene repertoire in the pig genome

Species Number of functional genes Number of pseudogenes Percentage of functional gene
Pig 1,113 188 86
Rat 1,201 292 80
Dog 872 222 80
Mouse 1,037 354 75
Zebrafish 102 35 74
Human 388 414 48
Frog 410 478 46
Pufferfish 44 54 45
Chicken 82 476 15
  1. Note: Except for pig, data were from Niimura and Nei [40].