The discoloration of Siamese cats is due to the activity of tyrosinase in the body. The tyrosinase in Siamese cats promotes melanin synthesis and pigment deposition. Siamese cats are partially albino cats. The tyrosinase in their bodies is defective and cannot function at normal body temperatures. Only when the body temperature is lower than 33 degrees, it will take effect. In addition, age will also affect the activity of tyrosinase.

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Siamese cats are native to Thailand. Generally speaking, the coat color of Siamese cats will change with body temperature and age. The lower the body temperature, the Or the older the Siamese cat is, the darker the fur color of the Siamese cat is. Therefore, when most Siamese cats are born, the fur color is relatively white. As they grow older, the body temperature changes accordingly, and Siamese cats begin to appear color patches. .