Immunogen sequence: VIEECHYTVL GDAFKECFVS RPHPKPKQFS SFEKRAKIFC ARQNCSHDWG IHVKYKTFEI PVIKIESFVV EDIATGVQTL YSKWKDFHFE KIPFDPAEMS K. Retinoic acid-inducible gene I, RIG-I is a pattern recognition receptor (PRR) involved in the recognition of viral dsRNA.