<prompt> Edmans reagent is -2-4 dinitrophenol1 -fluoro-2, 4-dinitrobenzenePhenyl-isocyanateCynogen bromide  <response>: Ans. is 6c i.e., Phenyl-isocyanateo Determination of amino acid sequence sequence analysis is performed by Edman degradation method on automatic mechines, called cyclic sequentors. Edmans reagent is phenyl-isothiocyanate, and forms a covalent bond to N- terminal of amino-acid. This can be identified.o Sangers reagent l-fluoro-2,4-dinitrobenzene can be used in place of Edmans reagent. 