Hameoglobin and Collagen Flashcards
Globular proteins
Are round, compact and easily soluble so they can be transported in fluids. E.g. haemoglobin and enzymes.
Fibrous proteins
Tough and rope shaped. Tend to be found in connective tissues such as tendons. E.g. collagen
Haemoglobin is…
globular protein.
Haemoglobin is composed of…
two alpha chains and two beta chains.
Haemoglobin structure
Is curled up so that hydrophilic side chains face outwards and hydrophobic side chains face inwards. Therefore, it is soluble.
Haemoglobin contains…
4 haem groups-important, permanent, part of protein molecule not made of amino acids.
Haem group is also called…
prosthetic group.
Each haem group contains…
an iron atom.
One oxygen molecule can…
bind with each iron atom.
Collagen is made of…
3 polypeptide chains tightly coiled in a strong triple helix
Collagen’s chains are…
interlinked by strong covalent bonds and hydrogen bonds.
Glycine
Every third amino acid in each polypeptide on the inside.
Glycine allows the three…
strands to lie close together.
Minerals can bind to the…
triple helix to increase its strength.
Three-stranded molecule of collagen interacts with….
other collagen molecules running parallel to it.
