Immunogen sequence: MEPSSWSGSE SPAENMERMS DSADKPIDND AEGVWSPDIE QSFQEALAIY PPCGRRKIIL SDEGKMYGRN ELIARYIKLR TGKTRTRKQV SSHIQVLARR. TEF1 (Transcriptional enhancer factor 1), a member of the TEA/ATTS domain family, is a nuclear protein that is expressed in