### protein | antibody:

Specific antibody
* Some specific antibodies show apparent cleavages
* Specific antibodies match specific antigens, fitting together much the way a key fits a lock.

### protein | body part:

Membrane protein
* Many membrane proteins cross the membrane multiple times.
* Some membrane proteins are enzymes.
* Some membrane proteins involve in drug resistance
* are also able to diffuse in the plane of the membrane
  - constituents
  - critical components in neuron function
* are difficult to crystallize
  - purify especially in an active form
  - protein molecules
  - vital to many cellular and physiological processes
* can form dimers or larger aggregates.
* carry out a number of important cellular functions.
* contain internal channels that allow such molecules to enter and exit the cell.
* contribute stability and many functions, such as transport.
* determine most of the membrane's functions.
* drift more slowly than lipids.
* float among the phospholipid molecules in the cell membrane
  - like islands in a sea of lipid
* have distinct directional orientation.
* organize a symmetrical virus.
* play key roles in the functioning of the living cell.
* represent one of the great frontiers of structural biology today.
* vary from highly hydrophilic to predominately hydrophobic.

Casein protein
* are especially important for cheesemaking.
* have three major types, and all three appear in every mammal species on Earth.
* major determinant in cheese yield.
* make milk look milky.

### protein:

Collagen
* Some collagen has properties.
* Some collagen promotes bone growth
* accounts for more than half of the protein content of tissue.
* comes from animal products, usually beef connective tissues.
* consists of groups of white inelastic fibers with great tensile strength.
* contributes to meat toughness.
* crosslinks in metabolic bone disease.
* decreases in the dermis which causes sagging.
* fibers self-assemble in the extracellular space.
* forms the base for all connective tissue in the body
  - of all connective tissues that hold our structures together
* includes atoms.
* includes chemical chain
* is fibrous proteins
* mRNA Around a Titanium.
* occur in everything from sponges to vertebrates.
* occurs in bundles.
* play a fundamental role in cardiac hypertrophy and interact with proteoglycans.
* provides structures.
* results from the cleavage of the extension peptide domains.
* shapes the structures of tendons, bones, cartilage and connective tissue.
* simple protein
* smoothes out wrinkles and stretch marks.
* strengthens the blood vessels, the skin, the muscles and the bones.

Complement protein
* Some complement proteins lead to degradations.
* activate other proteins in domino fashion.
* are acute phase reactants and have short half-lives
  - small molecules that circulate in the blood
* bind to microorganisms either directly or indirectly.
* circulate in the blood in an inactive form.
* help the body recognize and destroy foreign tissues.
* invade the site.

Complete protein
* are foods that provide the balance of essential amino acids
* contain all the amino acids necessary for human growth and maintenance.
* contain ample amounts of all essential amino acids
* contains all the essential amino acids needed for protein synthesis in the body.
* has a complete spectrum of amino acids.
* provide all of the essential amino acids.

Crude protein
* Most crude proteins reduce excretion
  - nitrogen excretion
* is comprised of both true protein and nonprotein nitrogen
  - the basis for nutritional labeling on an international basis
  - very sensitive to the stage of grass maturity
* measurement based on the nitrogen content of a feed ingredient.