US PATENT SUBCLASS 530 / 356
.~.~ Collagen

Current as of: June, 1999
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530 /   HD   CHEMISTRY: NATURAL RESINS OR DERIVATIVES; PEPTIDES OR PROTEINS; LIGNINS OR REACTION PRODUCTS THEREOF

350  DF  PROTEINS, I.E., MORE THAN 100 AMINO ACID RESIDUES {14}
353  DF  .~ Scleroproteins, e.g., fibroin, elastin, silk, etc. {3}
356.~.~ Collagen

DEFINITION

Classification: 530/356

Collagen:

(under subclass 353) Proteins having the structure of collagen and compounds derived from these by addition to or deletion of parts of the polypeptide structure.

(1) Note. Physical Properties. Number of Residues: approximately 1000. Molecular Weight: about 130,000. The collagen molecule contains three peptides chains, each having about 1000 amino acids residues. Nearly one third of all the residues are glycine, with typical repeating sequences being Gly-Pro-Hyp and Gly-Pro-Ala. The chains are arranged in a triple helix and contain intramolecular cross-links. Denaturation of collagen is the conversion of the rigidly coiled helix to a random coil called gelatin.

(2) Note. Type of Collagen

Type

Distribution

I

Skin, tendon, bone, cornea

II Cartilage, intervertebral disc, vitreous body

III

Fetal skin, cardiovascular system

IV

Basement membrane

(3) Note. Synonyms. Ossein, Avitene, Avicon.

(4) Note. Sources. Hides, skin, leather hair, connective tissue.

(5) Note. CA Registry Number of unmodified form: 9007-34-5 [figure]

SEE OR SEARCH CLASS

516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,

77+, for colloid systems of colloid-sized solid phase dispersed in aqueous continuous liquid phase, subclasses 98+ for colloid systems of continuous or semicontinuous solid phase with discontinuous liquid phase (gels, pastes, flocs, coagulates); or agents for such systems or making or stabilizing such systems or agents; in each instance, when generically claimed or when there is hierarchically superior provision in the USPC for the specifically claimed art. 527, Synthetic Resins or Natural Rubbers,

100+, and 200+ for the formation of a synthetic resin by simultaneous chemical reaction of a protein cellular material (e.g., hair, horn, leather) or a protein or biologically active polypeptide and resin forming ingredient.