sentences:  When attempting to identify biological molecules that would disrupt the formation of the F complex, researchers developed a high-throughput fluorescence polarization (FP)-binding assay.In this assay, a small peptide of a known sequence was synthesized and tagged with a fluorescent molecule.This traceable peptide of sequence KYTYDELFQLK binds to the binding site of endogenous 4E-BPs on eIF4E.