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iFluor 350™ PSA™ Imaging Kit with Goat Anti-Rabbit IgG

Power Styramide™ Signal Amplification (PSA™) system is one of the most sensitive methods that can detect extremely low-abundance targets in cells and tissues with improved fluorescence signal 10-50 times higher than the widely used tyramide (TSA) reagents. In combination with our superior iFluor™ dyes that have higher florescence intensity, increased photostability and enhanced water solubility, the iFluor™ dye-labeled Styramide™ conjugates can generate fluorescence signal with significantly higher precision and sensitivity (more than 100 times) than standard ICC/IF/IHC. PSA utilizes the catalytic activity of horseradish peroxidase (HRP) for covalent deposition of fluorophores in situ.  PSA radicals have much higher reactivity than tyramide radicals, making the PSA system much faster, more robust and sensitive than the traditional TSA reagents.
Power Styramide™ Signal Amplification (PSA™) system is one of the most sensitive methods that can detect extremely low-abundance targets in cells and tissues with improved fluorescence signal 10-50 times higher than the widely used tyramide (TSA) reagents. In combination with our superior iFluor™ dyes that have higher florescence intensity, increased photostability and enhanced water solubility, the iFluor™ dye-labeled Styramide™ conjugates can generate fluorescence signal with significantly higher precision and sensitivity (more than 100 times) than standard ICC/IF/IHC. PSA utilizes the catalytic activity of horseradish peroxidase (HRP) for covalent deposition of fluorophores in situ.  PSA radicals have much higher reactivity than tyramide radicals, making the PSA system much faster, more robust and sensitive than the traditional TSA reagents.
Fluorescence images of HeLa cells labeled with rabbit anti-Tubulin primary antibody. Cells were then stained with a HRP-labeled Goat anti-Rabbit IgG secondary antibody followed by iFluor™ 350 Styramide™ (Left) or Alexa Fluor® 350 tyramide (Middle and Right), respectively. Fluorescence images were taken using the DAPI filter set and the exposure time was labeled accordingly. iFluor™ 350 Styramide™ shows significantly higher fluorescence intensity than Alexa Fluor® 350 tyramide if under the same exposure time (25 ms). Alexa Fluor® 350 tyramide requires exposure time higher (125 ms) to visualize the staining.
Ordering information
Price ()
Catalog Number45200
Unit Size
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Additional ordering information
Telephone1-408-733-1055
Fax1-408-733-1304
Emailsales@aatbio.com
InternationalSee distributors
ShippingStandard overnight for United States, inquire for international
Physical properties
Molecular weight931.13
Spectral properties
Correction Factor (260 nm)0.83
Correction Factor (280 nm)0.23
Extinction coefficient (cm -1 M -1)200001
Excitation (nm)345
Emission (nm)450
Quantum yield0.951
Storage, safety and handling
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
UNSPSC12352200

OverviewpdfSDSpdfProtocol


Molecular weight
931.13
Correction Factor (260 nm)
0.83
Correction Factor (280 nm)
0.23
Extinction coefficient (cm -1 M -1)
200001
Excitation (nm)
345
Emission (nm)
450
Quantum yield
0.951
Power Styramide™ Signal Amplification (PSA™) system is one of the most sensitive methods that can detect extremely low-abundance targets in cells and tissues with improved fluorescence signal 10-50 times higher than the widely used tyramide (TSA) reagents. In combination with our superior iFluor™ dyes that have higher florescence intensity, increased photostability and enhanced water solubility, the iFluor™ dye-labeled Styramide™ conjugates can generate fluorescence signal with significantly higher precision and sensitivity (more than 100 times) than standard ICC/IF/IHC. PSA utilizes the catalytic activity of horseradish peroxidase (HRP) for covalent deposition of fluorophores in situ. PSA radicals have much higher reactivity than tyramide radicals, making the PSA system much faster, more robust and sensitive than the traditional TSA reagents. Compared to tyramide reagents, the Styramide™ conjugates have ability to label the target at higher efficiency and thus generate significantly higher fluorescence signal. Styramide™ conjugates also allow significantly less consumption of primary antibody compared to standard directly conjugate method or tyramide amplification with the same level of sensitivity. iFluor™ 350 PSA kit is a much superior replacement for Alexa Fluor 350 tyramide-based kit or other spectrally similar fluorescent tyramide or TSA kits.

Platform


Fluorescence microscope

ExcitationDAPI filter set
EmissionDAPI filter set
Recommended plateBlack wall/clear bottom
Instrument specification(s)DAPI filter set

Components


Component A: iFluor™ 350 Styramide™ conjugate1 vial (lyophilized powder)
Component B: Styramide™ Reaction Buffer 1 bottle (10 mL)
Component C: DMSO1 vial (100 µL)
Component D: Secondary Antibody-HRP (Goat Anti-Rabbit IgG-HRP)1 vial (100 µL) (100X)
Component E: Stabilized 3% Hydrogen Peroxide (H2O2)1 bottle (11 mL)

Example protocol


AT A GLANCE

Protocol Summary
  1. Fix/permeabilize/block cells or tissue
  2. Add primary antibody in blocking buffer
  3. Add HRP-conjugated secondary antibody
  4. Prepare Styramide™ working solution and apply in cells or tissue for 5-10 minutes at room temperature 

PREPARATION OF STOCK SOLUTIONS

Unless otherwise noted, all unused stock solutions should be divided into single-use aliquots and stored at -20 °C after preparation. Avoid repeated freeze-thaw cycles.

1. Styramide™ stock solution (100X)
Add 100 µL of DMSO into the vial of iFluor™ 350-labeled Styramide™ conjugate (Component A) to make 100X Styramide™ stock solution.
Note     Make single use aliquots, and store unused 100X stock solution at 2-8 °C in dark place and avoid repeat freeze-thaw cycles.


2. H2O2 solution (100X)
Add 1 mL of 3% hydrogen peroxide (Component E) to 9 mL of ddH2O.
Note     Prepare the 100X H2O2 solution fresh on the day of use.

PREPARATION OF WORKING SOLUTION

1. Styramide™ working solution (1X)
Every 1 mL of Reaction Buffer requires 10 µL of Styramide™ stock solution and 10 µL of H2O2 stock solution.
Note     The Styramide™ provided is enough for 100 tests based on 100 µL of Styramide™ working solution needed per coverslip or per well in a 96-well microplate.
Note     The Styramide™ working solution must be used within 2 hours after preparation and avoid direct exposure to light.


2. H2O2 solution (100X)
Add 1 mL of 3% hydrogen peroxide (Component E) to 9 mL of ddH2O.
Note     Prepare the 100X H2O2 solution fresh on the day of use.

SAMPLE EXPERIMENTAL PROTOCOL


This protocol is applicable for both cells and tissues staining.

Cell fixation and permeabilization
  1. Fix the cells or tissue with 3.7% formaldehyde or paraformaldehyde, in PBS at room temperature for 20 minutes.
  2. Rinse the cells or tissue with PBS twice.
  3. Permeabilize the cells with 0.1% Triton X-100 solution for 1-5 minutes at room temperature.
  4. Rinse the cells or tissue with PBS twice. 

Tissue fixation, deparaffinization and rehydration
Deparaffinize and dehydrate the tissue according to the standard IHC protocols. Perform antigen retrieval with preferred specific solution/protocol as needed.
Protocol can be found at https://www.aatbio.com/resources/guides/paraffin-embedded-tissueimmunohistochemistry-protocol.html  

Peroxidase labeling
  1. Optional: Quench endogenous peroxidase activity by incubating cell or tissue sample in peroxidase quenching solution (such as 3% hydrogen peroxide) for 10 minutes. Rinse with PBS twice at room temperature.
  2. Optional: If using HRP-conjugated streptavidin, it is advisable to block endogenous biotins by biotin blocking buffer.
  3. Block with preferred blocking solution (such as PBS with 1% BSA) for 30 minutes at 4 °C.
  4. Remove blocking solution and add primary antibody diluted in recommended antibody diluent for 60 minutes at room temperature or overnight at 4 °C.
  5. Wash with PBS three times for 5 minutes each.
  6. Apply 100 µL of secondary antibody-HRP working solution to each sample and incubate for 60 minutes at room temperature.
    Note     Incubation time and concentration can be varied depending on the signal intensity.
  7. Wash with PBS three times for 5 minutes each. 

Styramide labeling
  1. Prepare and apply 100 µL of Styramide™ working solution to each sample and incubate for 5-10 minutes at room temperature.
    Note     If you observe non-specific signal, you can shorten the incubation time with Styramide. You should optimize the incubation period using positive and negative control samples at various incubation time points. Or you can use lower concentration of Styramide in the working solution.
  2. Rinse with PBS three times. 

Counterstain and fluorescence imaging
  1. Counterstain the cell or tissue samples as needed. AAT provides a series of nucleus counterstain reagents as listed in Table 1. Follow the instruction provided with the reagents.
  2. Mount the coverslip using a mounting medium with anti-fading properties.
  3. Use the appropriate filter set to visualize the signal from the Styramide labeling. 
Table 1.Products recommended for nucleus counterstain
Cat# Product Name Ex/Em (nm)
17548 Nuclear Blue™ DCS1 350/461
17550 Nuclear Green™ DCS1 503/526
17551 Nuclear Orange™ DCS1 528/576
17552 Nuclear Red™ DCS1 642/660

Calculators


Common stock solution preparation

Table 1. Volume of appropriate solvent needed to reconstitute specific mass of iFluor 350™ PSA™ Imaging Kit with Goat Anti-Rabbit IgG to given concentration. Note that volume is only for preparing stock solution. Refer to sample experimental protocol for appropriate experimental/physiological buffers.

0.1 mg0.5 mg1 mg5 mg10 mg
1 mM107.396 µL536.982 µL1.074 mL5.37 mL10.74 mL
5 mM21.479 µL107.396 µL214.793 µL1.074 mL2.148 mL
10 mM10.74 µL53.698 µL107.396 µL536.982 µL1.074 mL

Molarity calculator

Enter any two values (mass, volume, concentration) to calculate the third.

Mass (Calculate)Molecular weightVolume (Calculate)Concentration (Calculate)Moles
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Spectrum


Open in Advanced Spectrum Viewer
spectrum

Spectral properties

Correction Factor (260 nm)0.83
Correction Factor (280 nm)0.23
Extinction coefficient (cm -1 M -1)200001
Excitation (nm)345
Emission (nm)450
Quantum yield0.951

Product family


NameExcitation (nm)Emission (nm)Extinction coefficient (cm -1 M -1)Quantum yieldCorrection Factor (260 nm)Correction Factor (280 nm)
iFluor 350™ PSA™ Imaging Kit with Goat Anti-Mouse IgG3454502000010.9510.830.23
iFluor 350™ PSA™ Imaging Kit with Goat Anti-Mouse IgG3454502000010.9510.830.23
iFluor 488™ PSA™ Imaging Kit with Goat Anti-Rabbit IgG4915167500010.910.210.11
iFluor 555™ PSA™ Imaging Kit with Goat Anti-Rabbit IgG55757010000010.6410.230.14
iFluor 594™ PSA™ Imaging Kit with Goat Anti-Rabbit IgG58860418000010.5310.050.04
iFluor 647™ PSA™ Imaging Kit with Goat Anti-Rabbit IgG65667025000010.2510.030.03