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Functions of Membrane Proteins in Plasma Membrane - Coggle Diagram
Functions of
Membrane Proteins in
Plasma Membrane
Provide stability
and support
Form channels/pores
allow certain substances
into/out cell
lined hydrophilic
groups
so allow water soluble + polar
substances through membrane
may be permanently
open or
be controlled
by gates
Transport
(carrier) proteins
bind to specific type
of diffusing molecule
which has a charges
group
like
glucose
amino acid
specific ion
when substance joins binding site
on protein, protein molecule changes
shape releasing diffusing molecule
@ other side
Enzymes
e.g. lactase breaks down
disaccharide lactose in milk
advantage of enzyme
attached to cell
membrane
enzyme positioned in location
needed with ideal pH
Adhesion Sites
hold adjacent cells
together
Receptors
recognise specific ligand
(molecule which can attach)
can alter cell's function
in some way
e.g. ADH binds to
receptor in cell membrane
in kidney
Needed
Cell-to-Cell Recognition
glycoproteins -
attach to proteins
glycolipids -
attach to phospholipids
helps similar cells
come together
form tissues
Antigens
D: any substance that
is foreign to the body
proteins found on surface
membrane of bacterial/viral cell
once recognised, immune
response activated
Antibodies
proteins which recognise
and destroy antigens