Patent ID: 7794946

Claim:
A kit comprising: at least one antibody array, said antibody array comprising a plurality of discrete locations arrayed in a spatially addressable ordered matrix on a solid surface, wherein each of the discrete locations comprises one or more spots of an antibody bound to the solid surface, wherein a plurality of the discrete locations contain antibodies that are different from the antibodies of the other discrete locations; a first detectable label for labeling a first protein sample; optionally a second detectable label for detectably labeling a second protein sample, wherein the second detectable label is different from the first detectable label; and instructions for using the kit to perform one or more of the following: i. identifying antigens in the first or the second protein samples that bind to one or more of the antibodies bound to the solid surface; ii. comparing the protein expression profiles of two or more protein samples; iii. characterizing the first or the second protein samples based on the protein expression profile thereof; and iv. determining the effect of varying binding conditions on the affinity of the bound antibodies to antigens present in first or second protein samples.