Profile: Immunostaining specializes in providing Human Fibronectin ELISA Kit. We offer paraffin embedding, fixation, tissue sectioning, and antigen retrieve services. Formaldehyde fixation usually generates methylene bridges which cross-link proteins and therefore mask the epitope of interest. It is essential to unmask the antigen epitopes in order to allow the antibodies to bind, either by heat (Heat Induced Epitope Retrieval: HIER) or enzymatic digestion (Proteolytic Induced Epitope Retrieval: PIER).