Summary
Summary Topic 6 Antibodies
Edexcel Biology Topic 6 Antibodies, Antigen, Complementary, Specific, Phagocytosis
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Antibodiesimmunoglobulin proteins
-
4
polypeptides two
long to short
(Quaternary Structure
-
-
,
S.I units
- two
heavy , two
light
mmm)
joined by disulfice
-
bridges
-
Y-shaped hinged region
,
Variable region site
binding
-
-
different sequence of amino acid
different to shape
-
specific different antigens a
complementary shape
-
form an
antigen-antibody complex
Opsonisation
binds the
-
y-shaped antibodies
antigens on the pathogen
-
coating he pathogen
↳ attachment becomes easier
he constant region
,
phagocytosis is easier
fits
↳ into a receptor
he
on
phagocyte , now
specific
Agglutination
antibodies are diamonds
y = =
↳ togeher (sticks hem together
Agglutinates
anumpathogens
immobile
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