The invention relates to fragments of an amino acid sequence of mature, full length 24 kDa fibroblast growth factor-2 or an analog thereof. The fragments have an activity that inhibits the migration of cultured cells as well as inhibiting angiogenesis, tumor growth, or any other processes that involve the migration of cells in vivo. This fragment does not stimulate the proliferation of cells which is in contrast to activity shown by the mature, full-length 24 kDa fibroblast growth factor-2. The present invention also relates to a DNA molecule encoding the fragment, an expression vector and a transformed host containing the DNA molecule, and a method of producing the protein by culturing the transformed host. Moreover, the present invention relates to a therapeutic composition the 24 kDa fibroblast growth factor fragment and a pharmaceutically acceptable carrier.