_DyLight-Microscale-Protein-Labeling-Kits-230

Thermo Scientific DyLight microscale protein labeling kits contain NHS ester-activated derivatives of our high-performance DyLight dyes designed specifically for labeling small quantities of antibodies or proteins.  Once they are fluorescently labeled, antibodies and other proteins can be used as probes for cellular imaging and other fluorescence detection methods.

  • High performance—DyLight dyes show bright fluorescence compared to classic dyes like FITC and rhodamine.
  • Specific—NHS ester-activated dye labels proteins and other molecules at primary amines (-NH2)
  • Optimized procedure—following the standard protocol results in antibodies with dye:protein ratios and recovery rates that help optimize fluorescence labeling and activity

DyLight microscale protein labeling kit components

DyLight_Emissions

Each Thermo Scientific DyLight microscale protein labeling kit contains all the necessary components for five labeling reactions of 100 μg of protein with molecular weight of 50-150K, and subsequent excess dye removal. The DyLight dyes included in these kits are activated with N-hydroxysuccinimide (NHS) esters, which is the most commonly used reactive group for labeling proteins. NHS esters react with primary amines to form stable, covalent amide bonds and free NHS groups. The DyLight dyes have absorption spectra ranging from 350 nm to 770 nm (Table 1). These reagents fluoresce over a broad pH range and match the output wavelengths of common fluorescence instrumentation. Additionally, the water solubility of DyLight reagents enables conjugations using a high dye-to-protein ratio without precipitation.

Our purification resin and spin columns help eliminate equilibration steps, and reduce the need to collect and monitor gravity-flow fractions. This system helps enable the efficient removal of excess dye and, helping you achieve  better protein recovery and a more accurate determination of the dye-to-protein ratio.
Each kit includes:

  • DyLight Fluor NHS Ester, 5 x 15 μg vials
  • Borate Buffer (0.67M), 1mL 
  • Purification Resin, 5mL 
  • Microcentrifuge Spin Columns, 5 each 
  • Microcentrifuge Collection Tubes, 10 each
     

DyLight microscale protein labeling kit protocol

The protocol for the DyLight microscale protein labeling kits is very easy and consists of 2 main steps (Figure 1).

FluorLabeling-fig1

Figure 1. The protocol is simple and provides efficient labeling, exceptional clean-up and excellent antibody recovery.

Table 1. DyLight microscale protein labeling kit selection guide

Microscale Protein
Labeling Kit
Ex/Em (nm) Cat. No. Spectra Comparable dyes
DyLight 350 353/432 62276 Description: Excitation and Emission Spectra of DyLight 350 Fluorophore Alexa Fluor 350, AMCA
DyLight 405 400/420 53021 Description: Excitation and Emission Spectra of DyLight 405 Fluorophore Alexa Fluor 405, Cascade Blue
DyLight 488 493/518 53025 Description: Excitation and Emission Spectra of DyLight 488 Fluorophore Alexa Fluor 488, fluorescein, FITC
DyLight 550 562/576 84531 Description: Excitation and Emission Spectra of DyLight 550 Fluorophore Alexa Fluor 546, Alexa Fluor 555, Cy3,TRITC
DyLight 594 593/618 53045 Description: Excitation and Emission Spectra of DyLight 594 Fluorophore Alexa Fluor 594, Texas Red
DyLight 633 638/658 53047 Description: Excitation and Emission Spectra of DyLight 633 Fluorophore Alexa Fluor 633
DyLight 650 652/672 84536 Description: Excitation and emission spectra for DyLight 650 Alexa Fluor 647, Cy5
DyLight 680 692/712 53057 Description: Excitation and Emission Spectra of DyLight 680 Fluorophore Alexa Fluor 680, Cy5.5
DyLight 755 754/776 84539 Description: Excitation and Emission Spectra of DyLight 750 Fluorophore Alexa Fluor 750
DyLight 800 777/794 53063 Description: Excitation and Emission Spectra of DyLight 800 Fluorophore IRDye® 800