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5255159
Types of Proteins
Descrição
- Structure and function of Globular proteins - Structure and function of Fibrous proteins
Sem etiquetas
globular
fibrous
haemoglobin
insulin
amylase
collagen
keratin
elastin
biology
biological molecules
a-level
Mapa Mental por
Dean Lundie
, atualizado more than 1 year ago
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Dean Lundie
mais de 8 anos atrás
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Resumo de Recurso
Types of Proteins
Globular
Round and compact
Hydrophilic R groups are pushed to the outside of the molecule, due to interactions in the tertiary structure
Soluble
Easily transported in fluids
Haemoglobin
Carrier oxygen around the body in red blood cells
Conjugated protein
"A protein with a non-protein group"
Non-protein part is the prosthetic group
Each of the four polypeptide chains has a prosthetic group called haem
Haem group contains an iron which bonds with oxygen
Insulin
Hormone secreted by Pancreas
Regulate blood glucose levels
Solubility is important, as it can be transported in the blood
2 polypeptide chains connected by disulfide bonds
Amylase
Enzyme that catalyses the breakdown of starch in the digestive system
Single chain of amino acids
Secondary structure contains both A-helix and B-pleated sheets
Most enzymes are globular proteins
Fibrous
Insoluble and Strong
Structural proteins that are fairly unreactive
Collagen
Found in animal connective tissues, such as bone and skin
Strong Molecule
Minerals can bind to the protein to increase its rigidity
Quaternary Structure
Keratin
Found in external structures of animals eg: nails
It can either be flexible (skin) or hard and tough (nail)
Elastin
Found in elastic connective tissue
It is elastic and allows tissue to return to its original shape if it has been stretched
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