5-TAMRA-PEO3-amine (Tetramethylrhodamine-PEO3-amine) has a long water-soluble PEG spacer separating the dye and the amine functional group. The dye can be coupled to activated carboxy groups or sulfonyl chlorides.
<ul>
<li>&lamba;_Ex/&lamba;_Em (MeOH) = 544/571 nm</li>
<li>Dark purple solid soluble in DMSO, DMF, or H2O</li>
<li>Store at 4°C and protect from light</li>
<li>C₃₇H₄₂F₆N₄O₁₁</li>
<li>MW: 832.74</li>