Humans carry this GTPase as well. GTP is energy source of receptors called G protein coupled receptors. They are about 750 these and many of them are catecholamine receptors, like the serotonin and dopamine receptors.

Humans also carry this gene. https://www.uniprot.org/uniprotkb/Q6ZRI8/entry

In humans, both DNA and RNA are mostly expressed in the brain and in the endocrine system.

https://www.proteinatlas.org/ENSG00000147256-ARHGAP36/tissue

For cats it very well may be different. Genes do not express activity the same indifferent species and they’re definitely not the same in different parts of the body. Genes can express RNA in one part of the body and more DNA and another part.

But I think this deletion is really about how it affects the methylation the gene.