Cyanine5 NHS ester iodide is a red-fluorescing dye that labels amino groups in peptides, proteins, and oligonucleotides [1].

Cyanine-5 NHS酯是一种红色发光的荧光染料，它能与端肽中丝氨酸氨基酸的游离氨基发生反应，这些端肽用于对Poly(β-amino esters)（pBAEs）主链进行末端封端[1]。