cysteine
L-Cysteine is a neutral, genetically coded, semi-essential amino acid (meaning that the human body can produce it on its own with proper nutrition).
When referring to amino acids, the words “essential” and “non-essential” don’t have their normal meanings. Essential amino acids are amino acids that the human body can not produce on its own and must gather from food sources. Non-essential amino acids are amino acids that the human body can produce on its own. Both kinds are required for human health.
[Cysteine] functions as an antioxidant and is a powerful aid to the body in protecting against radiation and pollution. It can help slow down the aging process, deactivate free radicals, neutralize toxins; aids in protein synthesis and presents cellular change. It is necessary for the formation of the skin, which aids in the recovery from burns and surgical operations. Hair and skin are made up 10-14% Cystine.
—courtesy of Austin Nutritional research
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three letter abbreviation: cys
one letter abbreviation: c
linear structure formula: HS-CH2-CH(NH2)-COOH
molecular formula: C3H7NO2S
molecular weight: 121.15
isoelectric point (pH): 5.02 (neutral)
pKa values: 1.71, 8.33 (thiol), 10.78
CAS Registry Number 52-90-4
See also: amino acids and thiol
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