Disclosed is an isolated antigen binding protein, such as but not limited to, an antibody or antibody fragment. Also disclosed are pharmaceutical compositions and medicaments comprising the antigen binding protein, isolated nucleic acid encoding it, vectors, host cells, and hybridomas useful in methods of making it. In some embodiments the antigen binding protein comprises one to twenty-four pharmacologically active chemical moieties conjugated thereto, such as a pharmacologically active polypeptide.