Patent ID: 8455624

Claim:
A kit comprising an antibody or an antigen-binding fragment thereof which differentially binds to an epitope within an iron-modified form of a polypeptide which comprises, consists essentially of, or consists of an iron-modified form of SEQ ID NO: 11 or an iron-modified fragment thereof, wherein said iron modified form of SEQ ID NO: 11 has a mass of about 2098 daltons, wherein said differential binding of said antibody or antigen-binding fragment thereof to said iron-modified polypeptide or iron-modified fragment thereof is relative to a form of said polypeptide or fragment thereof which is not iron modified, wherein said antibody or antigen-binding fragment thereof is attached to a solid support, and wherein said epitope includes the iron-modified form of SEQ ID NO: 11 or an iron-modified fragment thereof.