Cat intelligence the average human. Within the encephalization quotient proposed by Jerison in 1973, values above 1 are classified big brained, while values lower than 1 are small brained. The domestic cat is attributed a value of between 1–1.71 relative to human value that is 7.44–7.8. The largest brains in the Felidae family are those of the tigers in Java and Bali, of which the largest relative brain size within the "panthera" is the "tigris". It is debated whether there exists a causal relationship between brain size and intelligence in vertebrates. Correlations have been shown between these factors in a number of
Cadherin related family member 3 Cadherin related family member 3 Cadherin related family member 3 (CDHR3), also known as CDH28 or its abbreviation CDHR3, is a protein that in humans is encoded by the "CDHR3" gene. The exact physiological role of CDHR3 is not known, but as the CDHR3 protein is expressed in epithelial tissues and has six extracellular cadherin domains plus a short transmembrane segment, it is believed to be related to the function of similar cadherins which function in cell adhesion and cell-to-cell signaling. Two single-cell RNA expression studies furthermore found CDHR3 to be highly selectively expressed in ciliated epithelial cells, compared to