Immunogen sequence: GLPFYNGFYY SNSANDQNLG NGHGKDLLNG VKLVVETPEE TLFTYQGASV ILPCRYRYEP ALVSPRRVRV KWWKLSEN Highest antigen sequence identity to the following orthologs: Mouse - 76%, Rat - 74%. HAPLN3 is a 360 amino acid extracellular protein belonging to