Antibodies, Immobilized 1 Antigens 1 Article 1 Biosensors 1 Chelating affinity 1 Fc receptor 1 Horseradish Peroxidase 1 Humans 1 Immunoglobulin Fab Fragments 1 Immunoglobulin Fc Fragments 1 Immunosensors 1 Male 1 Oriented antibody immobilization Schiff base 1 Surface Properties 1 adsorption 1 aldehyde 1 amino terminal sequence 1 antibody combining site 1 antigen 1 antigen recognition 1 beta galactosidase 1 binding affinity 1 binding site 1 bulk density 1 chelate 1 complex formation 1 controlled study 1 covalent bond 1 deprotonation 1