Labeling Chemistry Selection Tool

Welcome to the Labeling Chemistry Selection Tool featuring Molecular Probes® reagents and labeling technologies! Quickly find the best reactive dye or label for your experiment. Whether you are labeling proteins and antibodies for immunofluorescence, nucleic acids for in situ hybridization, or lipids for membrane studies, this tool will help you find the right conjugation product.

Here are a few definitions to help you get started:

Reactivity - this filter refers to the chemical group on the molecule you want to label (i.e. your antibody, protein or DNA)

Reactive Moiety - this filter refers to the chemical group on the dye or label you want to attach to your molecule (i.e fluorescein isothiocyanate, Alexa Fluor® 488 malemide)

12 Products Returned

  Product name
  Fluorophore/Label
  Excitation
  Emission
  Extinction Coefficient
  Cat #
  Size List Price (USD) Qty
Alexa Fluor® 350 C5 maleimide Alexa Fluor 350 346 nm 442 nm 17,000 cm-1M-1 A30505 1 mg 245.00
Alexa Fluor® 488 C5 maleimide Alexa Fluor 488 494 nm 519 nm 73,000 cm-1M-1 A10254 1 mg 245.00
Alexa Fluor® 532 C5 maleimide Alexa Fluor 532 530 nm 555 nm 81,000 cm-1M-1 A10255 1 mg 245.00
Alexa Fluor® 546 C5 maleimide Alexa Fluor 546 554 nm 570 nm 112,000 cm-1M-1 A10258 1 mg 245.00
Alexa Fluor® 555 C2 maleimide Alexa Fluor 555 555 nm 572 nm 155,000 cm-1M-1 A20346 1 mg 245.00
Alexa Fluor® 568 C5 maleimide Alexa Fluor 568 575 nm 600 nm 92,000 cm-1M-1 A20341 1 mg 245.00
Alexa Fluor® 594 C5 maleimide Alexa Fluor 594 590 nm 617 nm 92,000 cm-1M-1 A10256 1 mg 245.00
Alexa Fluor® 633 C5 maleimide Alexa Fluor 633 622 nm 640 nm 143,000 cm-1M-1 A20342 1 mg 246.00
Alexa Fluor® 647 C2 maleimide Alexa Fluor 647 651 nm 672 nm 250,000 cm-1M-1 A20347 1 mg 246.00
Alexa Fluor® 660 C2 maleimide Alexa Fluor 660 668 nm 697 nm 112,000 cm-1M-1 A20343 1 mg 246.00
Alexa Fluor® 680 C2 maleimide Alexa Fluor 680 684 nm 714 nm 175,000 cm-1M-1 A20344 1 mg 246.00
Alexa Fluor® 750 C5-maleimide Alexa Fluor 750 749 nm 782 nm 240,000 cm-1M-1 A30459 1 mg 246.00