Breaking down body tissue( muscle & organ) for use of protein when its lacking from your diet
Indispensable amino acids
Amino acids that the body cannot make at all or enough of to meet physiological needs therefore must come from diet. aka "essential"
made by the body if it has enough nitrogen, not needed to come from diet. aka "non essential"
Conditionally dispensable amino acids
Normally made in the body, but they become indispensable ( not made) in cases such as critical illness.
Proteins we consume are broken down into what three categories
single amino acids, dipeptides, or tripeptides
the bond between two amino acids formed when a corboxyl group joins an amino group and releasing water.
Two or three amino acids joined by a peptide bond
Oligopeptide & polypeptide
What determines the function and interaction of a protein
its 3-D shape formed from its chain of amino acids.
Oxygen carrying protein in red blood cells= 4 heme groups 4 globin polypeptide chains
electrically charged and attached to the charged ends of water molecules. WATER LOVING AMINO ACIDS
electrically neutral and don't interact with water, WATER FEARING AMINO ACIDS
Bond between sulfur components in 2 sulfur containing amino acids that stabilize a proteins structure
What factors affect the stabilization of proteins causing them to denature or lose their shape?
Heat, alcohol, acid, alkaline, and agitation
altering the 3D shape of a protein, protein unfolds. Ex.cooking an egg, is denaturation but is the first step to breaking down protein for digestion
Functions of protein in our body ( 8)
- act as enzymes - transport oxygen etc. - structure
- act as hormones -channel and pump v& M
-make antibodies to protect us -maintain fluid balance - & acid balance
Most abundant and fibrous protein foundation of bones, teeth, structures blood vessels
water insoluble fibrous protein in hair, nails, and outer skin layer
convert food to physical work by converting energy. They divide cells, contract muscles and sperm swimming
Blood proteins that attack and inactivate bacteria and viruses causing infection, once they are formed they circulate your body to protect it.