Immunogen sequence: QRYYGGGYGS TQATFMVFQA LAQYQKDAPD HQELNLDVSL QLPSRSSKIT HRIHWESASL LRSEETKENE GFTVTAEGKG QGTLSVVTMY HAKAKDQLTC NKFDLKVTIK PAPETEKRPQ DAKNTMILEI CTRYRGDQDA TMS. C3 is a key component of the complement system since classical and alternat