NCIt definition : A recombinant vaccinia virus encoding a modified peptide of the gp100 melanoma-melanocyte
antigen with potential use in cancer immunotherapy. gp100 human antigen is a wild
type self-antigen expressed by melanocytes, pigmented retinal cells and most melanomas.
gp100p209 is a fragment epitope of gp100 in which the threonine in position 2 is replaced
with methionine; this modification may stimulate tumor infiltrating lymphocytes (TIL)
more efficiently. (NCI04);