Antikroppar Flashcards

1
Q

Vilka Igs har 3 respektive 4 constant regions?

A

IgG, IgD och IgA har 3. IgE och IgM har 4.

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2
Q

Vilka Igs förekommer inte främst som endast monomerer?

A

IgA (dimer) och IgM (hexamer/pentamer)

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3
Q

Vad är funktionen av IgG?

A

Complement fixation
Placenta transfer - protect infants through maternal
Phagocyte response (Fc receptor dependent)
Diffuse into tissue with infection (extravesicular)
Most amount in circulation (80 %)
Long half-life

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4
Q

Vad är funktionen av IgD?

A

Only present on mature B-cells (BCR mainly)
Very little in circulation

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5
Q

Vad är funktionen av IgE?

A

Immunity against helminths (worm parasites)
Binds potent granulocytes (mast cells) - only need small amounts for balance
Found on surfaces

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6
Q

Vad är funktionen av IgA?

A

Can transport across mucosal epithelia (dimer) with polymeric Ig receptor (plgR)/secretory component (by epithelial cells)
Most produced but secreted in saliva etc. - found in mucosal

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7
Q

Vad är funktionen av IgM?

A

Complement fixation/activation
Relatively low affinity
Contain carbohydrates
Potent immune complex

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