Accelerated evolution of CES7, a gene encoding a novel major urinary protein in the cat family - PubMed Cauxin is a novel urinary protein recently identified in the domestic cat that regulates the excretion of felinine, a pheromone precursor involved in sociochemical communication and territorial markin...

Cat-cat interactions are mostly dominated by pheromones and not meows.

This is really fascinating because of the genomics for all #darkgenome, #noncodinggenome, #denovogene folks.

Cats rapidly evolved CES7 as a urinary pheromone for cat-cat communication.

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pubmed.ncbi.nlm.nih.gov/20966115/