Immunogen sequence: ASLPRKERKR REEQMPREGD SFEVLPLRND VLNPDNYGEV IDLSNYEELT DYGDQLPEVK VTSLAPATSI SPAKSTTAPG TPSSNPTMTR PTTAGL. Opticin, also known as OPTC or OPT, is a 332 amino acid protein that is secreted into the extracellular matrix and contains sev