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AF 488 streptavidin

AF 488 Flow cytometry Microscopy

貨號	數量	價格	交貨時間	購買此產品
A18S0	100 ug	–	現貨
118S0	1 mg	$185 $169	現貨

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Streptavidin is a tetrameric biotin-binding protein derived from the bacterium Streptomyces avidinii. Streptavidin binds up to four biotin molecules with high affinity and selectivity via multiple hydrogen bonds and van der Waals interactions. Due to the lack of carbohydrate modifications and a near-neutral pI, streptavidin exhibits less nonspecific binding than another biotin-binding protein — avidin. Streptavidin also has high thermostability and resistance against extreme pH, denaturing agents, and enzymatic degradation, allowing using this protein under various experimental conditions.

Fluorescent conjugates of streptavidin are commonly used as a second-step reagent for specific detection of a variety of biotin-labeled biomolecules, such as proteins (antibodies, etc.), nucleic acids, lipids, and other molecules in indirect immunofluorescent staining, western blots, flow cytometry, microplate assays, and other detection techniques.

This streptavidin is a lyophilized conjugate with AF 488, a bright, photostable green fluorophore with spectral characteristics similar to FITC (absorption max. at 495 nm, emission max. at 519 nm).

The recommended concentration range for use is 0.5-10 µg/mL. Avoid using biotin-containing solutions (some serums, RPMI 1640, etc.) as diluents.

建議協議

Biotin-Streptavidin Conjugation

計算機

解决方案计算器

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General properties

Appearance:	orange solid
Solubility:	good in water
Storage conditions:	Store at -20°С 9 months from date of receipt. Transportation: at room temperature for 1 week.
MSDS:	下載
	產品規格

Spectral properties

Excitation/absorption maximum, nm:	495
ε, L⋅mol⁻¹⋅cm⁻¹:	71800
Emission maximum, nm:	519
Fluorescence quantum yield:	0.91
CF₂₆₀:	0.16
CF₂₈₀:	0.10

Product is offered and sold for research purposes only. Product is not tested for safety and efficacy in food, drug, medical device, cosmetic, no express or implied authorization to use for any other purpose, including, without limitation, in vitro diagnostic purposes, for humans or animals or for commercial purposes.