Abstract: The invention relates to a method for detecting the binding of an antibody to an Fc receptor present on the surface of a cell as well as to a method for determining the level of glycosylation of an antibody. The invention also relates to a reagent kit for carrying out these methods.

Abstract: The invention relates to a method for determining the ability of a candidate antibody to keep a first cell and a second cell close to one another, said method comprising the following steps: bringing said candidate antibody in contact with (i) a first cell expressing, in the extracellular portion of its plasma membrane, a first protein that is known to be or is suspected of being recognized by the candidate antibody and (ii) a second cell expressing, in the extracellular portion of the plasma membrane, a second protein that is also known to be or suspected of being recognized by the candidate antibody, each of the proteins being labeled with a member of a pair of FRET partners, and measurement of the FRET signal and comparison with the signal measured in the absence of the candidate antibody. The invention also relates to a reagent kit for carrying out this method.

Abstract: The invention relates to a method for detecting the binding of an antibody to an Fc receptor present on the surface of a cell as well as to a method for determining the level of glycosylation of an antibody. The invention also relates to a reagent kit for carrying out these methods.