Streptavidin Janelia Fluor® 549
Product overview
| Name | Streptavidin Janelia Fluor® 549 |
| Biological description | Streptavidin Janelia Fluor® 549 is a biotin binding protein conjugated with the fluorescent dye Janelia Fluor® 549 and can be used to detect biotin labelled molecules such as nucleic acids, antibodies, and other proteins. Biotinylated antibodies are bound with extremely high affinity by Streptavidin Janelia Fluor® 549 enabling immunofluorescent detection in IHC, ICC, flow cytometry and Western blot. Janelia Fluor® 549 and the other members of the Janelia Fluor® family are bright and highly photostable fluorophores particularly suited for super resolution imaging such as dSTORM and STED.
Key features: · Conjugated with Janelia Fluor® 549 (Ex: 552nm, Em: 579nm) · Supplied as a more stable lyophilate · Bright and photostable signal for repeated imaging · Suited for IHC(IF), ICC, Western blotting and Flow cytometry |
| Description | Janelia Fluor® 549 conjugated streptavidin for detection and signal amplification of biotin coupled proteins and antibodies. |
Images
Figure 1: Parvalbumin positive interneuron cells in the rat hippocampus.
Method: Rat brains were dissected and fixed overnight in 4% PFA before then being incubated in 30% sucrose (in PBS) until sunk (approx. 48hrs). A freezing microtome was used to cut 40µm horizontal slices before sections were incubated in 1% NaBH4 for 30 minutes. Sections were blocked in 0.05M glycine, 2% BSA and 3% donkey serum before incubation overnight in Parvalbumin HB6457 (1:1,000 dilution) at 4°C. This was followed by a two hour incubation with goat anti-mouse biotin antibody HB11345 at a dilution of 1:250 Following three washes in PBST, sections were incubated with Streptavidin Janelia Fluor® 549 (HB18064) at 1.0 µg/mL for 2 hours at room temperature. DAPI HB0747 was used at 1µg/ml to visualise cell nuclei. For more detail please see our IHC(IF) protocol. Images were captured using a Leica DMI6000B inverted epifluorescence microscope. Images were captured using a 20x objective in a z-stack with exposures: DAP: 224.256 ms, Y3: 1044.272 ms. Stacks were deconvolved using Huygens professional then flattened using a maximum Z projection in ImageJ (Schindelin et al., 2012. Nat Methods, 9(7), 676–682).
Figure 2. Parvalbumin positive interneurons and GFAP positive astrocytes in the rat hippocampus.
Method: Rat brains were dissected and fixed overnight in 4% PFA before then being incubated in 30% sucrose (in PBS) until sunk (approx. 48hrs). A freezing microtome was used to cut 40µm horizontal slices before sections were incubated in 1% NaBH4 for 30 minutes. Sections were blocked in 0.05M glycine, 2% BSA and 3% donkey serum before incubation overnight in Parvalbumin HB6457 (1:1,000 dilution) and GFAP HB6406 (1:4000 dilution) at 4°C. This was followed by a two hour incubation with goat anti-mouse biotin antibody (HB11345) at a dilution of 1:250 and goat anti-chicken Alexa Fluor™ 488, (Invitrogen) at a dilution of 1:300. Following three washes in PBST, sections were incubated with Streptavidin Janelia Fluor® 549 (HB18064) at 1.0 µg/mL for 2 hours at room temperature. DAPI HB0747 IHC(IF) protocol. Images were captured using a Leica DMI6000B inverted epifluorescence microscope. Images were captured using a 20x objective in a z-stack with exposures: DAP: 224.256 ms, GFP: 677.506 ms, Y3: 1044.272 ms Stacks were deconvolved using Huygens professional then flattened using a maximum Z projection in ImageJ (Schindelin et al., 2012. Nat Methods, 9(7), 676–682).
Figure 3. Parvalbumin positive interneuron populations in the rat hippocampus
Figure 4. Concentration response of Streptavidin Janelia Fluor® 549 (HB18064) staining in rat hippocampus.
Method: Rat brains were dissected and fixed overnight in 4% PFA before then being incubated in 30% sucrose (in PBS) until sunk (approx. 48hrs). A freezing microtome was used to cut 40µm horizontal slices before sections were incubated in 1% NaBH4 for 30 minutes. Sections were blocked in 0.05M glycine, 2% BSA and 3% donkey serum before incubation overnight in anti-Parvalbumin HB6457 (1:1,000 dilution) at 4°C. This was followed by a two hour incubation with secondary biotin antibody at a 1:300 dilution (goat anti-mouse biotin antibody HB11345. Following three washes in PBST, sections were incubated with Streptavidin Janelia Fluor® 549 (HB18064) at 0.5 µg/mL, 1.0 µg/mL or 10 µg/mL for 2 hours at room temperature. DAPI HB0747 was used at 1µg/ml to visualise cell nuclei. For more detail please see our IHC(IF) protocol . Images were captured using a Leica DMI6000B inverted epifluorescence microscope. Images were captured using a 20x objective in a z-stack with exposures:
0.5 µg/mL: DAP: 116.034 ms, Y3: 948.378 ms
1.0 µg/mL: DAP: 224.256 ms, Y3: 1044.272 ms
10.0 µg/mL: DAP: 139.756 ms, Y3: 233.469 ms
Stacks were deconvolved using Huygens professional then flattened using a maximum Z projection in ImageJ (Schindelin et al., 2012. Nat Methods, 9(7), 676–682).
Figure 1: Parvalbumin positive interneuron cells in the rat hippocampus.
Method: Rat brains were dissected and fixed overnight in 4% PFA before then being incubated in 30% sucrose (in PBS) until sunk (approx. 48hrs). A freezing microtome was used to cut 40µm horizontal slices before sections were incubated in 1% NaBH4 for 30 minutes. Sections were blocked in 0.05M glycine, 2% BSA and 3% donkey serum before incubation overnight in Parvalbumin HB6457 (1:1,000 dilution) at 4°C. This was followed by a two hour incubation with goat anti-mouse biotin antibody HB11345 at a dilution of 1:250 Following three washes in PBST, sections were incubated with Streptavidin Janelia Fluor® 549 (HB18064) at 1.0 µg/mL for 2 hours at room temperature. DAPI HB0747 was used at 1µg/ml to visualise cell nuclei. For more detail please see our IHC(IF) protocol. Images were captured using a Leica DMI6000B inverted epifluorescence microscope. Images were captured using a 20x objective in a z-stack with exposures: DAP: 224.256 ms, Y3: 1044.272 ms. Stacks were deconvolved using Huygens professional then flattened using a maximum Z projection in ImageJ (Schindelin et al., 2012. Nat Methods, 9(7), 676–682).
Figure 2. Parvalbumin positive interneurons and GFAP positive astrocytes in the rat hippocampus.
Method: Rat brains were dissected and fixed overnight in 4% PFA before then being incubated in 30% sucrose (in PBS) until sunk (approx. 48hrs). A freezing microtome was used to cut 40µm horizontal slices before sections were incubated in 1% NaBH4 for 30 minutes. Sections were blocked in 0.05M glycine, 2% BSA and 3% donkey serum before incubation overnight in Parvalbumin HB6457 (1:1,000 dilution) and GFAP HB6406 (1:4000 dilution) at 4°C. This was followed by a two hour incubation with goat anti-mouse biotin antibody (HB11345) at a dilution of 1:250 and goat anti-chicken Alexa Fluor™ 488, (Invitrogen) at a dilution of 1:300. Following three washes in PBST, sections were incubated with Streptavidin Janelia Fluor® 549 (HB18064) at 1.0 µg/mL for 2 hours at room temperature. DAPI HB0747 IHC(IF) protocol. Images were captured using a Leica DMI6000B inverted epifluorescence microscope. Images were captured using a 20x objective in a z-stack with exposures: DAP: 224.256 ms, GFP: 677.506 ms, Y3: 1044.272 ms Stacks were deconvolved using Huygens professional then flattened using a maximum Z projection in ImageJ (Schindelin et al., 2012. Nat Methods, 9(7), 676–682).
Figure 3. Parvalbumin positive interneuron populations in the rat hippocampus
Figure 4. Concentration response of Streptavidin Janelia Fluor® 549 (HB18064) staining in rat hippocampus.
Method: Rat brains were dissected and fixed overnight in 4% PFA before then being incubated in 30% sucrose (in PBS) until sunk (approx. 48hrs). A freezing microtome was used to cut 40µm horizontal slices before sections were incubated in 1% NaBH4 for 30 minutes. Sections were blocked in 0.05M glycine, 2% BSA and 3% donkey serum before incubation overnight in anti-Parvalbumin HB6457 (1:1,000 dilution) at 4°C. This was followed by a two hour incubation with secondary biotin antibody at a 1:300 dilution (goat anti-mouse biotin antibody HB11345. Following three washes in PBST, sections were incubated with Streptavidin Janelia Fluor® 549 (HB18064) at 0.5 µg/mL, 1.0 µg/mL or 10 µg/mL for 2 hours at room temperature. DAPI HB0747 was used at 1µg/ml to visualise cell nuclei. For more detail please see our IHC(IF) protocol . Images were captured using a Leica DMI6000B inverted epifluorescence microscope. Images were captured using a 20x objective in a z-stack with exposures:
0.5 µg/mL: DAP: 116.034 ms, Y3: 948.378 ms
1.0 µg/mL: DAP: 224.256 ms, Y3: 1044.272 ms
10.0 µg/mL: DAP: 139.756 ms, Y3: 233.469 ms
Stacks were deconvolved using Huygens professional then flattened using a maximum Z projection in ImageJ (Schindelin et al., 2012. Nat Methods, 9(7), 676–682).
Optical Data
| Fluorescence spectra |  |
| Emission color | Yellow |
| Max excitation wavelength | 549nm |
| Max emission wavelength | 571nm |
| Closest laser lines | 561nm |
| Spectrally similar dyes | DyLight 550, Alexa Fluor® 546, Alexa Fluor® 555, BDY TMR-X, Atto 550, Cyanine 3, CF 555, TAMRA |
| Quantum Yield (φ) | 0.88 |
| Extinction Coefficient (ε) | 101,000 M-1cm-1 |
| Correction Factor 280 | 0.169 |
Biological Data
| Application notes | #Protocol 1: Detecting biotin-labelled antibodies in IHC 1. Incubate free floating rat brain sections (40µm) in sodium borohydride (NaBH4) for 15 minutes followed by 2 hours in blocking buffer (0.05M glycine, 2% BSA and 3% donkey serum). 2. Incubate sections with primary antibody in blocking buffer at 4°C overnight, as in our IHC protocol. 3. Wash sections three times in PBST for 5 minutes each. 4. Incubate sections with 2 µg/mL goat anti-mouse biotin antibody HB11345 or goat anti-rabbit antibody HB11036 diluted in blocking buffer for 2 hours at RT. 5. Wash sections three times in PBST for 5 minutes each. 6. Incubate sections with 1 µg/mL Streptavidin Janelia Fluor® 549 in blocking buffer for 2 hours. 7. Wash sections three time in PBST for 5 minutes each. 8. Incubate sections with 10 µg/mL DAPI for 10 minutes. 9. Wash sections in dH2O, mount on glass slides with mounting media and cover with coverslip. 10. Image the sections on a microscope using a 561nm laser or TRITC filter set to excite Streptavidin Janelia Fluor® 549. |
Solubility & Handling
| Storage instructions | -20°C then use reconstitution advice |
| Reconstitution advice | We recommend reconstituting with either 1ml of:
|
| Storage buffer | When reconstituted contains PBS with 0.05% sodium azide and 1% recombinant BSA. |
| Important | This product is for RESEARCH USE ONLY and is not intended for therapeutic or diagnostic use. Not for human or veterinary use |
Chemical Data
| Molecular Weight | 52 |
| Formulation | Lyophilised. When reconstituted contains 0.05% sodium azide and 1% recombinant albumin |
| Licensing details | Sold under license from the Howard Hughes Medical Institute, Janelia Research Campus |
References for Streptavidin Janelia Fluor® 549
-
Recent advances in the engineering and application of streptavidin-like molecules.
Le Q et al (2019) Applied microbiology and biotechnology 103 : 7355-7365 -
Streptavidin-biotin technology: improvements and innovations in chemical and biological applications.
Dundas CM et al (2013) Applied microbiology and biotechnology 97 : 9343-53 -
Essentials of biorecognition: the (strept)avidin-biotin system as a model for protein-protein and protein-ligand interaction.
Wilchek M et al (2006) Immunology letters 103 : 27-32
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