A recombinant human protein fragment (within amino acids 282-415) was used as the immunogen for the OCLN antibody.
Occludin/OCLN is a tetraspan integral membrane protein in epithelial and endothelial tight junction (TJ) structures that can contain two extracellular loops. The protein exists in a variety of phosphorylated forms. Phosphorylation is involved in regulating both the localization and the function of Occludin.