Tailor every stain

  • Fast – In solution, add fluorochromes to biotinylated antibodies in less than 10 min. No columns, washes, or purification steps needed.
  • Adaptable – Label as little as 1 µg or up to several mgs of biotinylated antibodies. Use straight away or store for later.
  • Flexible – Tailor-make each stain. The four most popular fluorochromes in IHC are available.


FlexiStain™ maximizes the potential
of biotinylated antibodies

FlexiStain attaches fluorochromes to biotinylated antibodies in solution in less than 10 minutes.  FlexStained antibodies labelled with Alexa488, Atto542 (Cy3 equivalent), Alexa594 and Alexa647 are as bright as directly conjugated antibodies and can be used straight away or stored at +4C for use later. FlexiStained antibodies can be made so efficiently and in such small volumes that it becomes practical to label individual antibodies with any of the 4 fluorochromes depending on the experiment. This makes FlexiStain a powerful tool that increases the flexibility of existing antibody libraries and makes designing and setting up panels for multistainings quick and easy.

Illustrated user protocol
Step 1


<p><strong><span style="color: #6b1c95;">Conjugation</span></strong></p>
Step 2


<p><strong><span style="color: #6b1c95;">Immunostaining</span></strong></p>
Step 3


<p><strong><span style="color: #6b1c95;">Analysis</span></strong></p>

For more detailed information, see the user manual.


1 μl FlexiStain™ reagent labels 0,1 μg biotinylated antibody.

Product Content* Price

FlexiStain™ Singles (S)

250 μl FlexiStain™ of your choice.

165 €

FlexiStain™ Singles (L)

1000 μl FlexiStain of your choice.

495 €

FlexiStain™ 4-pac (S)

250 μl AlexaFluor 488 FlexiStain

250 μl ATTO-TEC 542 FlexiStain

250 μl AlexaFluor 594 FlexiStain

250 μl AlexaFluor 647 FlexiStain

495 €

FlexiStain™ 4-pac (L)

1000 μl AlexaFluor 488 FlexiStain

1000 μl ATTO-TEC 542 FlexiStain

1000 μl AlexaFluor 594 FlexiStain

1000 μl AlexaFluor 647 FlexiStain

1485 €

* The Alexa Fluor trademark belongs to LTC and Kromnigon Products contain technology licensed to Kromnigon by LTC under Limited Use Label License (LULL).