Biocytin Alexa Fluor™ 488 (Alexa Fluor™ 488 Biocytin, Disodium Salt)
Biocytin Alexa Fluor™ 488 (Alexa Fluor™ 488 Biocytin, Disodium Salt)
Invitrogen™

Biocytin Alexa Fluor™ 488 (Alexa Fluor™ 488 Biocytin, Disodium Salt)

The cell-impermeant, fixable, polar tracer Alexa Fluor™ 488 biocytin combines the green-fluorescent Alexa Fluor™ 488 fluorophore with biotin and anRead more
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Catalog number A12924
Price (USD)
439.00
Each
Add to cart
Price (USD)
439.00
Each
Add to cart
The cell-impermeant, fixable, polar tracer Alexa Fluor™ 488 biocytin combines the green-fluorescent Alexa Fluor™ 488 fluorophore with biotin and an aldehyde-fixable primary amine. Polar tracers are commonly used to investigate cell-cell and cell-liposome fusion as well as membrane permeability and transport through gap junctions or cell uptake during pinocytosis. This water-soluble tracer can be introduced into cells by whole-cell patch clamping, iontophoresis, osmotic lysis of pinocytic vesicles or comparable methods. The biotin allows for detection and subsequent amplification with enzyme-modified streptavidins including horseradish (HRP) and alkaline phosphatase (AP) that can be used with TSA and ELF technologies, respectively.
For Research Use Only. Not for use in diagnostic procedures.
Specifications
Quantity250 μg
Label or DyeAlexa Fluor Dyes
Shipping ConditionRoom Temperature
Product LineAlexa Fluor™
Unit SizeEach
Contents & Storage
Store at room temperature and protect from light.

Frequently asked questions (FAQs)

I injected a fluorescent tracer, but cannot detect it after tissue is fixed and sectioned. What am I doing wrong?

Confirm that the tracer you are using crosslinks to proteins or has a primary amine for fixation-either a hydrazide, lysine fixable dextran, or a protein conjugate.
Use aldehyde-based fixatives to cross link the amines on the tracer.
Inject a larger amount or higher concentration of the tracer. Tracers are generally injected at 1-20% concentrations (10 mg/mL or higher).
Confirm that you are using the correct fluorescent filter for detection. You can perform a spot test by pipetting a small amount of the undiluted stock solution of the tracer onto a slide, then view under the filter you are using on your microscope. This will confirm if the tracer fluorescence can be detected and the fluorescent microscope filter is working properly.
Review tissue fixation and handling procedures to confirm if any reagents or processing procedures could be affecting the tracer.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

I have labeled my neurons with an Alexa Fluor conjugated biocytin to look at transport but I wanted to examine only retrograde transport and biocytin appears to be moving retrograde and anterograde. What should I do?

Observing both types of transport is typical for biocytin. The conjugated cholera toxin subunit B products have been observed to travel only retrogradely.

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.

Do you have a neuronal tracer similar to Lucifer Yellow but in another fluorescent color?

Lucifer Yellow CH is a hydrazide, so any of our Alexa Fluor or fluorescent hydrazides could potentially be used. A listing of them can be found here. (https://www.thermofisher.com/us/en/home/life-science/cell-analysis/cell-tracing-tracking-and-morphology/neuronal-tracing/hydrazides-biocytins.html#prd)

Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.