This invention provides peptides of the formula R'-Glx-Glx-Lys-R" in which
Glx is Glu or Gln. In particular, this invention provides the peptides
Thr-Ala-Glu-Glu-Lys and Thr-Pro-Glu-Glu-Lys. This invention also provides
pharmaceutical compositions comprising these peptides. The peptides of
this invention are useful for immunomodulation.