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FcγR<br />

Espressione<br />

FcγRIIA (CD32)<br />

Macrofagi, neutrofili, eosinofili, piastrine, cellule di Langerhans, DC<br />

FcγRIIB (CD32)<br />

LinfB, mastcellule, basofili, eosinofili, neutrofili, cellule di Langerhans, DC<br />

FcγRIIIA (CD16)<br />

Macrofagi, mastcellule, NK, eosinofili, DC, monociti, cellule di Langerhans<br />

FcγRIIIB (CD16)<br />

Neutrofili, eosinofili<br />

Interazione Recettore-Ligando<br />

-Rec: D2/ D2-D1 link<br />

-Ig: Cγ2(Pro329-Trp)/regione<br />

cardine limitrofa<br />

-Ponti salini, legame H, interazioni<br />

idrofobiche<br />

-L’interazione comporta una<br />

variazione conformazionale del<br />

recettore e dell’immunoglobulina<br />

_Importanza dei siti glicosilati<br />

Fig.Jenny M.Woof 2004

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