Immunogen sequence: PTQFLCPKNV TDEQEGFAEG FVRALAELHS QNTLPSVTSA AQPVNGAGMV APAVASVAGG SGSGGFSASL HSE Antigen sequence identity: Mouse 93%; Rat 93%. c-Jun is a transcription factor that recognizes and binds to the enhancer heptamer motif 5'-TGA[CG]TCA-3'.