Protein Flashcards
What is the NH2
Amino acid
Basic
What is the COOH
Carboxyl group
Acidic
Name two examples of amino acids and their variable
Glycine=H
Cysteine=HS-CH2
What amino acids can be
a) Manufactured by the body
b) obtained from food
a) non essential
b) essential
How many essential amino acids do
Adults need
Children need
8
10
(CHILDREN) Histidine
(CHILDREN) Arginine
(BOTH) Valine
How many non essential amino acids are there an name two
10
Alanine
Proline
How many bonds does \_\_\_\_\_ have Hydrogen Oxygen Nitrogen Carbon
1 2 3 4 HONC
How many peptides make a poly peptide
20
How many peptides make a protein
50
How many poly peptides are in a chain for the primary structure of a protein
20
How is a secondary structure formed
The folding of a primary structure into definite shapes
Name two cross link bonds
Disulfide bind
Hydrogen bond
What is a disulfide bond
When two sulfures from two amino avduees form either a single polypeptide or two different polypeptide chains
Eg cysteine
What is a hydrogen bond
When a hydrogen from the NH group of one Amin acid and an oxygen from the C=O group of another ami o acid join together to make a single polypeptide chain or two different polypeptide chains
Eg collagen
What is a tertiary structure
The folding of secondary structure proteins into 3D shapes
What are the names of the tertiary structures
Fibrous - arranged, straight, zigzag
Globular- spheric shape
What are properties of fibrous and globular
F
Insoluble in water
Not easily denatured
Eg gluten
G
Soluble
Easily denatured
Eg ovalbumin
Name the plant subgroups examples and sources of properties
Glutenins- glutenin wheat
Prolamines - zein - wheat
Name an example of a lipoprotein
Lecithin
Name an example of a phosphoprotein
Caseiniogen
What proteins are in soya beans
Glycinin
What proteins are in meat bone
Gelatine
What is the Maillard reaction
Non enzymic browning of food due to the reaction between two amino aides and sugars under dry heat
What is the energy value of protein
1g prot = 4kcal energy
What transports amino acids to the liven
Hepatic portal vein
