J
chains & Secretory Piece
UAdditional structures associated with
immunoglobulins:
-J chains
Lpresent in
all immunoglobulins with two or more basic molecules joined together (IgA and IgM)
Lonly one J
chain is found in each molecule regardless of the number of basic units joined together.
-Secretory
pieces
Lpresent in
IgA which is in the dimeric form (2 basic units joined by J chain)
Lallows IgA to
be secreted into body fluids
(sweat & saliva)
