Jackson Immuno Research Inc.
specializing in secondary antibodies and conjugates

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Steptavidin, a bacterial protein isolated from Streptomyces avidinii, is similar to egg-white avidin in its ability to bind biotin, and has been used as a replacement for egg-white avidin because of its more favorable chemical properties.

Conjugates of streptavidin are recommended for use with Biotin-SP-conjugated antibodies and Biotin-SP-conjugated ChromPure proteins.
Physical State: Freeze-dried solid

Storage and Rehydration: Store freeze-dried solid at 2-8°C. Rehydrate with the indicated volume of dH2O and centrifuge if not clear. Prepare working dilution on day of use. Product is stable for about 6 weeks at 2-8°C as an undiluted liquid.
Extended Storage after Rehydration: Aliquot and freeze at -70°C or below. Avoid repeated freezing and thawing. Alternatively, add an equal volume of glycerol (ACS grade or better) for a final concentration of 50%, and store at -20°C as a liquid.
Expiration date: one year from date of rehydration. The expiration date may be extended if test results are acceptable for the intended use.

Buffer: 0.01M Sodium Phosphate, 0.25M NaCl, pH 7.6
Stabilizer: 15 mg/ml Bovine Serum Albumin (IgG-Free, Protease-Free)
Preservative: 0.05% Sodium Azide

Suggested Working Concentration or Dilution Range:

Western Blot:- 2-5 µg / ml
Histo-/Cyto-Chemistry:- 2-5 µg / ml

Dilution factors are presented in the form of a range because the optimal dilution is a function of many factors, such as antigen density, permeability, etc. The actual dilution used must be determined empirically.

Coumarin AMCA

Amax: 350 Emax: 450nm

Aminomethylcoumarin Acetate (AMCA) conjugates absorb light maximally around 350 nm and fluoresce maximally around 450 nm. For fluorescence microscopy, AMCA can be excited with a mercury lamp and observed using a UV filter set. Since blue fluorescence is not well detected by the human eye, AMCA-conjugated secondary antibodies should be used only with the most abundant antigens in multiple-labeling experiments. Ways of improving the visibility of AMCA include dark adapting the eyes, using fluorite instead of glass objectives, avoiding mounting media that absorb UV light (such as plastic-based media), and capturing photographic images with blue-sensitive film or CCD cameras. AMCA fades rapidly in conventional epifluorescence and confocal microscopy, and therefore it should be used with mounting media containing an anti-fading agent such as n-propyl gallate.

Connexin expression in astrocytes of middle-aged rat retina

Tissue specimen of 9 month old (middle-aged) Wistar rat retina illustrates connexin expression in astrocytes in the mid-peripheral retina. Six-marker immunohistochemistry was executed on retinal wholemount preparations. Connexin 26 (blue, Alexa532-conjugated anti-goat IgG), Connexin 30 (red, Cy™3 AffiniPure Goat Anti-Rabbit IgG (H+L) - Jackson ImmunoResearch 111-165-003), Connexin 43 (green, Alexa 488-conjugated mouse IgG1), Connexin 45 (pale brown, Alexa 594-conjugated anti-sheep IgG), GFAP stained for astrocytes (pale purple, Cy™5 AffiniPure Donkey Anti-Chicken IgY (IgG) (H+L) - Jackson ImmunoResearch 703-175-155), GS Isolectin B4 stained for blood vessels (turquoise, AMCA-conjugated streptavidin - Jackson ImmunoResearch 016-150-084).

Mansour H, McColm JR, Cole L, Weible M II, Korlimbinis A, et al. (2013) Connexin 30 Expression and Frequency of Connexin Heterogeneity in Astrocyte Gap Junction Plaques Increase with Age in the Rat Retina. PLoS ONE 8(3): e57038. doi:10.1371/journal.pone.0057038

This product is for IN VITRO RESEARCH USE ONLY. It is not a medical device and it is not intended for diagnostic or therapeutic purposes.