Zusammenfassung der Ressource
Proteins
- Roles
- structural: proteins are the main component of body
tissues, such as muscle, skin, ligaments and hair
- catalytic: all enzymes are proteins,
catalyzing many biochemical
reactions
- signalling: many hormones
and receptors are proteins
- immunological: all antibodies are proteins.
- Dipeptides
- two amino acids join
together to form a
dipeptide linked by a
peptide bonds
- formed by a
condensation
reaction
- can be split by a
hydrolysis
reaction
- structure
- primary
- secondary
- tertiary
- quaternary
- Fibrous
- formed from
parallel polypeptide
chains held together
by cross-links
- These form long, rope-like fibres, with high
tensile strength and are generally insoluble
in water
- Globular
- usually have a spherical shape caused
by tightly folded polypeptide chains
- The chains are usually folded so that
hydrophobic groups are on the inside,
while the hydrophilic groups are on the
outside. This makes many globular
proteins soluble in water