Types of proteins Flashcards
what is the definition of a conjugated protein
proteins with another chemical group
what is a fibrous protein and its properties
polypeptide chain made up of many amino acids
little to no tertiary structure (mainly secondary)
hydrophobic R group on outside (insoluble)
long straight chains
repetitive sequence of amino acids
what is a globular protein and its properties
polypeptide chain made of amino acids folded into a spherical shape
has a tertiary structure (some have quaternary)
does not have repetitive sequence of amino acids
hydrophilic R groups on outside (soluble)
examples of conjugated protein
lipoproteins
haemoglobin
glycoproteins
examples of fibrous proteins
collagen
fibrin
keratin
examples of globular proteins
enzymes
fibrinogen
haemoglobin
is the haemoglobin globular or fibrous (explain answer)
globular
dissolves in water to be transported in the blood
how many polypeptide chains are in haemoglobin and what does this mean for its structure
4 polypeptide chains
mean its in the quaternary structure since it has more than 1 polypeptide chains (3D)
is haemoglobin soluble if so why
yes it is soluble
has hydrophilic R group side chains on the outside of its structure
means its polar and attracts other polar molecules (water)
what is the function of haemoglobin
binds and transports oxygen in the blood to cells
is collagen fibrous or globular and why
fibrous
has repetitive amino acid sequence
how many polypeptide chains are in collagen
3 (triple helix structure)
what is collagens structure and why
quaternary
has more than one polypeptide chain (3)
is collagen soluble and why
collagen is insoluble
has hydrophobic R groups on the outside of its structure which repels polar molecules like water
what is the function of collagen
strength and structure in blood vessels
