Immunogen sequence: GQPFDYSPIR FRARNGEYIT LDTSWSSFIN PWSRKISFII GRHKVRVGPL NEDVFAAHPC TEEKALHPSI QELTEQIHRL LLQPVPHSGS SGYGSLGSNG SHEHLMSQTS SSDSNGHEDS RRRRAEICKN GNKTKNRSHY SHESGEQKKK SVTEMQTNPP AEKKAVPAME KDSLGV. PER2, also known as Period circadian pr