PROTEIN

FUNCTIONS OF PROTEIN:1. Growth

2. Repair

3. Replacement of tissues

4. Body structure: skin, tendons, membranes, muscles, organs, bones

main functions

Foods with great source of protein:

beef chicken fish pork

eggs and dairy beans nuts and seeds

AMINO ACIDS

are the building blocks of protein

amino acids are connected by a peptide bond

Dipeptide – two amino acids bonded together

Tripeptide – three amino acids bonded together

Oligopeptide – four to nine amino acids bonded together

Polypeptide – ten or more amino acids bonded together

mechanical digestion of protein begins in the

chemical digestion of protein begins in the

Hydrochloric acid

changes proteins, so enzymes can break bonds that hold amino acids together

PROTEASEenzymes that hydrolyze proteins

prote = proteinase = enzymes

Ex:

Pepsin: breaks down protein into smaller pieces

Additional info:

antibodies – protect body against disease

easily digested proteins = high quality

Blood is also made of protein.