Interleukin-5 receptor (IL-5R) ligands comprising amino sequences of
formula TGGGDGYVX.sub.3VE X.sub.4 ARCPTCK, EGYVX.sub.3VE X.sub.4 ARCPTCK,
EGYVX.sub.3VE X.sub.4 ARCPTCR, GYVX.sub.3VE X.sub.4 ARCPTCG,
EGYVX.sub.3VE X.sub.4 ARCPTCG, GYVX.sub.3VE X.sub.4 ARCPTCR, and
EGYVX.sub.3VE X.sub.4 AACPTCR, and methods of using the same, are
described and claimed.