This invention relates to methods of inhibiting binding between a cell expressing integrin receptors specific for one or more integrins selected from the group consisting of αIIbβ3, αvβ3, αvβ5, or α5β1, said method comprising contacting the cell with a monomeric disintegrin or monomeric disintegrin domain which comprises a C-terminal sequence non-native to the disintegrin or disintegrin domain, said C-terminal sequence encoding a functional integrin-binding loop.
