Lab practical Flashcards
IgA
dimeric antibody
1 disulfide bonds
Fc 2 segments
IgG
monomeric antibody
2 disulfide bond
Fc 2 segments
IgE
monomeric antibody
1 disulfide bond
Fc 3 segments
IgD
monomeric antibody
1 disulfide bonds
Fc 2 segments
IgM
pentameric antibody
5 disulfide bonds along the base where they all connect
Fc 3 segments
Fab
top half of the antibody (fragment antigen binding)
Fc
bottom half of the antibody (Fragment crystallizable)
hinge
the bend between the top and bottom half
heavy chain
part of the fab that is connected to the Fc region
light chain
bonded to the heavy chain through disulfide bonds
neutrophil
granulocyte
phagocytosis bacteria
releases toxins to kill and inhibit bacteria
basophil
granulocyte
mature into mast cells
hypersensitivity reactions
defense against parasites, release histamine
eosinophil
granulocyte
release toxins to kill bacterial and parasites
monocytes
agranulocyte
become macrophages and dendritic cells
lymphocyte
agranulocyte
becomes B and T cells
follicle of lymph node
lymphocyte proliferation
efferent lymphatic vesicle
allow lymph to flow out
afferent lymphatic vesicle
allow lymph to enter lymph node
lymphatic artery
delivers blood to the lymph node
lymphatic vein
delivers blood away from the lymph node
germinal center of lymph node
activate, proliferate, differentiate B cells
medullary cord of lymph node
filled with T lymphocytes and plasma cells
trabeculae of lymph node
bundles of connective tissue
capsule of lymph node
dense irregular connective tissue
subcapsular sinus of lymph node
macrophages that first capture and retain pathogens in lymphatics
trabecular sinus of lymph node
connect subcapsular sinus to medullary sinus
red pulp of spleen
phagocytosis of all erythrocytes and pathogens
white pulp of spleen
contain germinal centers, B and T cells
germinal centers of spleen
B and T cell activation
marginal zone of spleen
white pulp transitions to red and their functions mix
splenic artery
delivers blood to spleen
splenic vein
delivers blood away from spleen
capsule of spleen
dense connective tissue
hilum of spleen
where artery enters the spleen
central arterial of spleen
filled with T dependent cells
A vs A Ochterlony test
identical
perfect V
AA antibody
A vs B
nonidentical
the V goes past on both sides
AB antibody
A vs Ab
partially identical
V goes past towards the A side only
AAb antibody
O blood type
H
universal donor
anti-a
anti-b
receives O
A blood type
H, A
anti-b
receive A, O
donate A, AB
B blood type
H, B
anti-A
receive B, O
donate B, AB
AB blood type
H, A, B
universal receiver
donate AB
how does a COVID test work?
sample pad
conjugate pad (Latex tag)
nitrocellulose membrane
test strip
control strip
wicking pad
test strip
tests antigen
if it is present it will bind to the antibodies
control strip
checks validity
common antigen binds that is found in everyone
how does a protein gel work
electrical current moves the negatively charged protein towards the positive electrode and gel beads filter the protein based on size
how do antibodies look on denaturing SDS-PAGE
like numerous bands in a gel that are finely separated
the sds denatures and gives them all a negative charge to separate based on size
how would they look on denaturing gel?
less bands due to less separation because the molecular weight is higher and have different isoelectric points
diagram how a western blot works
separation
transfer
binding antibodies
visualize
separation
typical gel with bands
transfer
(positive)
cassette
sponge
filter
membrane
gel
cassette
(negative)
negatively charged protein is attracted to positive and moves from the gel toward the membrane
binding of antibodies
membrane has antigen bound
primary antibody binds antigen by the fab region
secondary antibody binds primary antibody
enzyme is bound to secondary antibody for visibility
visualize
less bands are shown due to the binding of antibodies
diagram an ELISA
assay plate has capture antibody bound
primary antibody binds capture antibody
secondary antibody binds primary antibody
enzyme bound to secondary antibody as detection signal
explain how ELISA works
detects antigens by binding to them and transmitting a detectable signal through antigens
how can ELISA be used to detect antibodies
if the antibodies are present then the antigen is
how does ELISA work clinically
can be used to detect diseases such as HPV and viruses like COVID
start of classical cascade
antigen-antibody on C1qrs
C1
C4
C2
start of alternative cascade
activating surfaces
C3b
factor B
start of lectin cascade
pathogen surfaces on MASPS
C4
C2
Start of all cascades combining
C5
C5b (and C5a)
C9, C8, C7, C6, C5b forming MAC
what does the lectin pathway present for MAC
C9, C8, C7, C6
Protein A column
Binds to the Fc region of immunoglobulin IgG
Type I hypersensitivity
IgE
Type III hypersensitivity
IgG
Type II hypersensitivity
IgM or IgG