Since the olfactory receptor genes identified in 1991, great achievements have been obtained on the molecular and cellular olfaction mechanism of insect.
自1991年在动物中发现嗅觉受体基因以来，关于昆虫感受化学信息的周缘神经系统的分子和细胞机制方面的进展十分迅速。
The relatively small repertoire of olfactory receptor genes in primates compared to animals that kept their noses closer to the ground seems to support this notion.
与其他动物将鼻子贴近地面相比，灵长类动物的嗅觉受体基因已所剩无几，这似乎支持了上述观点。
For comparison, versions of about 300 human olfactory receptor pseudogenes are still functional genes in the genomes of rats and mice.
大约有300个人类嗅觉受体的伪基因，其相应基因在大鼠和小鼠的基因组内，仍是具有功能的基因。
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