Leucine - Law Dictionary Search Results
Home Dictionary Name: leucineLeucine
a naturally occurring alpha amino acid CH32CHCH2CHNH2 COOH one of the building units of almost all proteins of living organisms both animal and vegetable It is one of the essential amino acids not synthesized by the human body a required component for proper nutrition and is hydrophobic in character when bound in proteins In isolated form it is a white crystalline zwitterionic substance formed e g by the decomposition of proteins by pancreatic digestion by the action of boiling dilute mineral acid or by putrefaction Chemically it is to be considered as amido caproic acid It occurs as two optical isomers the L and D forms The L form L leucine is the natural form present in most proteins...
keratin
A sulfur containing fibrous protein constituting the main structural protein of hard epidermal tissues such as horn hair feathers nails claws hoofs and the like It is an insoluble substance and unlike elastin is not dissolved even by gastric or pancreatic juice By decomposition with sulphuric acid it yields leucine and tyrosine plus various other acid stable amino acids The amino acid composition varies but it usually has a high percentage of cystine which stabilizes and insolubilizes the protein by forming intrachain linkages A softer form of keratin is present in the epidermis and whalebone Called also epidermose...
Leucic
Pertaining to or designating an acid obtained from leucin and called also oxycaproic acid...
Neurokeratin
A substance resembling keratin present in nerve tissue as in the sheath of the axis cylinder of medullated nerve fibers Like keratin it resists the action of most chemical agents and by decomposition with sulphuric acid yields leucin and tyrosin...
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