Escherichia coli XL10-Gold and BL21(DE3) Gold cells were purchased from Stratagene. EZ-Run protein ladder was purchased from Fisher Bioreagents and Ni2+-nitrilotriacetate (Ni-NTA) resin from Qiagen. IANBD, Click-iT® Protein Reaction Buffer kit and iodoacetamide alkyne were obtained from Life Technologies. BADAN, oxazine derivatives (Blue Oxazine, Red Oxazine and Nile Blue) and Chromis dyes (Chromis 630 and 678) were purchased from Eurogentec, Chromeon and Cyanagen, respectively. The merocyanine dyes (Mero 53, 62 and 87) were synthesized as previously described [10 (link)–12 (link)]. Texas Red–dextran was obtained from Life Technologies.