ISOLEUCINE: It is an essential amino acid. It stimulates the brain to produce alertness. You might appreciate knowing that isoleucine is why mosquito bites. Actually, only the female mosquitoes bite people. They are in fact searching for isoleucine. It is one of the basic building blocks of life called an amino acid. Amino acids are what make up proteins, and female mosquitoes need these proteins to make eggs. If they find isoleucine they may lay as many as 100 eggs. But if they don’t find isoleucine then they may only lay at most 10 eggs. So how do the mosquito find isoleucine. It is part of our blood. The female mosquito punctures our skin with a part of her mouth known as her feeding stylets.Then she searches for blood vessels within our skin. A female mosquito usually finds a blood vessel in less than a minute. Next she sucks our blood through one mouthpiece. She can swallow up to four times her weight in blood, and when she is full she looks like a tiny red light bulb. She can do this because while she is sucking our blood, she is also injecting her saliva.There are special chemicals in her saliva which keep our blood from clotting. Actually, human blood is not the best source for isoleucine. Blood from buffaloes and rats contain more isoleucine but since people out number rats & buffaloes in many places the mosquito bites us instead.
LEUCINE: An essential amino acid, it stimulates protein synthesis and is important in protein storage.