Why do Siamese cats become darker and darker? Don't miss this knowledge. Siamese cats' fur color will darken with age. Generally speaking, when they are born, the fur color of Siamese cats is blue and will darken as they grow until their fur...
Why do Siamese cats become darker and darker? Don't miss this knowledge. Siamese cats' fur color will darken with age. Generally speaking, when they are born, the fur color of Siamese cats is blue and will darken as they grow until their fur color turns black.
There is a gene called TYR in mammalian cells, which is specifically responsible for the synthesis of tyrosinases, and the function of tyrosinase is to promote the synthesis of melanin and pigment deposition. The activity of tyrosinase affects the synthesis of melanin. The higher the activity, the more synthesis will be, the faster it will be.
Siamese cats also have this gene, but since Siamese cats are partially albino cats, the TYR gene in its body is mutated, resulting in defects in tyrosinase synthesis - it cannot function at normal body temperature, but it is active in areas below 33°C in the skin temperature.
The end tissues of a Siamese cat's ears, part of the face, limbs, and tail are low in temperature. Tyrosinase can be active in these skin tissues, so these parts will turn black.
Although the back skin of the Siamese cat is also on the main trunk, because it is exposed to slightly cool air most of the time, although the tyrosinase in this part of the skin is active, it is relatively low, and the coat color is slightly black.
Temperature and age are both factors that affect tyrosinase activity. For example, the older the Siamese cat, the darker it will become. Siamese cats in winter look darker than summer, Siamese cats in the north are darker and darker than Siamese cats in the south, etc. Careful shovelers can observe carefully, which is quite interesting.
