begin{tabular}{lcccc} I & III & III & IV & V hline Tyr-Lys-Met & Gly-Pro-Arg & Asp-Trp-Tyr & Asp- His-Glu & Leu-Val-Phe end{tabular} Which one of the above tripeptides: will yield DNB-tyrosine when reacted with 1-fluoro-2,4-dinitrobenzene and hydrolyzed in acid? A. II contains sulfur? B. I - is most negatively charged at pH7 ? C. III - contains the largest number of nonpolar R groups? D.IV - will have the greatest light absorbance at 280nm ? E. V - will be fluorescent.