In another aspect, the agent comprises one or more than one peptide which comprises a cytotoxic T lymphocyte epitope that binds an HLA class II molecule in a human to elicit a CTL response to 251P5G2 and one or more than one peptide which comprises a helper T lymphocyte epitope which binds an HLA class II molecule in {HEAD ~ a human} to elicit {TAIL ~ an HTL response} 
to elicit
In another aspect , the agent comprises one or more than one peptide which comprises a cytotoxic T lymphocyte epitope that binds an HLA class II molecule in a human to elicit a CTL response to 251P5G2 and one or more than one peptide which comprises a helper T lymphocyte epitope which binds an HLA class II molecule in { HEAD ~ a human } to elicit { TAIL ~ an HTL response }
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