DBCO-PEG12-DBCO is a monodisperse click chemistry linker containing two terminal DBCO groups with hydrophilic PEG spacer arm. DBCO will react with azide-bearing compounds or biomolecules to form a stable triazole linkage without copper catalyst. PEG spacer arm can increase water solubility and membrane permability. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Detail
DBCO-PEG12-DBCO is a monodisperse click chemistry linker containing two terminal DBCO groups with hydrophilic PEG spacer arm. DBCO will react with azide-bearing compounds or biomolecules to form a stable triazole linkage without copper catalyst. PEG spacer arm can increase water solubility and membrane permability. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
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L-Glutamine/Ammonia Assay Kit (Rapid)
Product Info
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Product Info
K-GLNAM
SKU: 700004295
50 assays of each (manual) / 500 assays of each (microplate)
Content:
50 assays of each (manual) / 500 assays of each (microplate)
Shipping Temperature:
Ambient
Storage Temperature:
Short term stability: 2-8oC, Long term stability: See individual component labels
Stability:
> 2 years under recommended storage conditions
Analyte:
Ammonia, L-Glutamine
Assay Format:
Spectrophotometer, Microplate
Detection Method:
Absorbance
Wavelength (nm):
340
Signal Response:
Decrease
Linear Range:
1 to 40 µg of L-glutamine per assay
Limit of Detection:
0.54 mg/L (L-glutamine), 0.06 mg/L (ammonia)
Reaction Time (min):
~ 10 min
Application examples:
Cell culture media and cultures, dietary supplements, vegetables and other materials (e.g. biological samples, etc.).
Method recognition:
Novel method
This product has been discontinued.
The L-Glutamine/Ammonia (Rapid) test kit is a novel method for the specific, convenient, cost effective and rapid measurement and analysis of L-glutamine and ammonia in culture media/supernatants and other materials.
Note for Content: The number of manual tests per kit can be doubled if all volumes are halved. This can be readily accommodated using the MegaQuantTM Wave Spectrophotometer (D-MQWAVE).
Extended cofactors stability. Dissolved cofactors stable for > 1 year at 4oC.
Very rapid reaction due to use of high activity glutaminase and uninhibited glutamate dehydrogense
All enzymes supplied as stabilised suspensions
Only enzymatic kit available
Very cost effective
All reagents stable for > 2 years after preparation
Mega-Calc™ software tool is available from our website for hassle-free raw data processing
Standard included
Document
The L-Glutamine/Ammonia (Rapid) test kit is a novel method for the specific, convenient, cost effective and rapid measurement and analysis of L-glutamine and ammonia in culture media/supernatants and other materials.
NGS Library Quantification Kit (for Small RNA-Seq)
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Product Info
Overview
Able to quantify NGS Library (Illumina) of a wide spectrum of concentrations, including sub-nanomolar concentrations
DNA is accurately quantified by using a standard curve constructed from the provided DNA Standards
Specially designed DNA standards for Small RNA-Seq library; also compatible to NGS library of other molecular weights
Norgen’s NGS Library Quantification Kit (for Small RNA-Seq) offers a PCR-based detection procedure to quantify NGS libraries (specifically Small RNA-Seq) of a wide spectrum of concentrations. The kit consists of a specially designed primer mix compatible with the Illumina system, that is used in conjunction with the provided 2X Real-Time PCR Master Mix to amplify a library of unknown concentration. The unknown library is accurately quantified by using a standard curve constructed from the provided DNA Standard (range from 20 pM to 2 fM) on a Real-Time PCR System. The kit is specially optimized to quantify Small RNA-Seq libraries with DNA standards that have similar size to a Small RNA-Seq library. However, it could also be used with other types of NGS libraries.
Storage Conditions Upon receipt, store Norgen’s NGS Library Quantification Kit (for Small RNA-Seq) at -20°C or lower. Avoid multiple freeze-thaw cycles. If needed, prepare smaller working aliquots and store at -20°C or lower.
Introducing the Fastin Assay Kit: Your Straightforward Solution for Elastin Quantification! Our user-friendly kit utilizes a dye-based method to measure elastin from in-vivo and in-vitro sources. It can be used to quantify various elastin forms, spanning from immature tropoelastin to mature, ‘insoluble’ elastin fibers.
Colorimetric Detection (513nm) (Endpoint)
Understanding Elastin: The Key to Tissue Flexibility
Tissues like lungs and arteries must maintain the ability to stretch and recoil repeatedly throughout an organism’s life. Elastin, a mature protein, is responsible for this elasticity and is usually present as insoluble fibers within the ECM. During development, these fibers are initially formed from a soluble precursor called tropoelastin.
What is the Fastin Assay?
The Biocolor Fastin assay is a user-friendly, dye-based means of quantifying elastins derived from both in-vivo and in-vitro sources. A variety of elastin forms can be assayed, from immature tropoelastin to mature ‘insoluble’ elastin fibres.
Further information on how the assay works can be found on the ‘Mode of Action‘ tab.
A list of suggested sample types can be found under the ‘Assay Specification‘ tab.
How does the Fastin assay detect Elastin?
The Fastin Dye Reagent contains an elastin-binding synthetic porphyrin, TPPS (5,10,15,20-tetraphenyl- 21H,23H-porphine). This affinity of TPPS for elastin was first observed when used as a ‘vital stain’ on live animals. Most tissues took up the dye initially but only elastin retained the TPPS molecules over time. [Winkelman, J. (1962), Cancer Res. 22, 589-596; Winkelman, J & Spicer, S. (1962), Stain Technol. 37, 303-305].
It has been proposed that the elastin binding of TPPS may be due to the retention of the acidic dye (which contains four charged sulfate groups) by the basic amino acid side chain residues of elastin.
How does the Fastin assay work?
Step 1. Incubation of samples containing soluble elastin with the Fastin Dye Reagent causes an elastin-dye complex to form. This insoluble complex then precipiates.
Step 2. Dye-labelled elastin is then isolated by centrifugation and the unbound dye removed. Elastin-bound dye is then eluted and measured spectrophotometrically.
Step 3. The elastin content of unknown samples can be calculated by comparison against a calibration curve prepared using a standard comprising water-soluble elastin (supplied with the kit).
Assay range
50 – 500µg/ml
Limit of Detection
50µg/ml
Detection Method
Colorimetric Detection (513nm) (Endpoint)
Measurements per kit
110 in total (allows a maximum of 48 samples to be run in duplicate alongside a standard curve).
Suitable Samples
In-vivo: tissues and fluids. Insoluble elastin will first require conversion to water soluble α-elastin using the oxalic acid reagents and extraction protocol supplied with the kit.
In-vitro: Elastin produced by cells during 2D/3D cell culture. NB elastin in conditioned cell media is typically below the detection limit of the kit.
Precautions
This kit is designed for research use only. Not for use in diagnostic procedures. Kit requires access to a centrifuge, heated water bath or block, as well as a spectrophotometer or colorimeter capable of absorbance detection at 513nm. Specific sample preparation protocols may require customer to provide further reagents, consult assay manual for further information.
Fastin elastin kit contents:
1. Dye Reagent (1x110ml)
2. α-elastin Reference Standard (1x5ml, 1.0 mg/ml soluble Bovine elastin)
6. 1.5ml micro-centrifuge tubes for dye-labelling reaction.
7. Assay kit manual
NB: Additional reagents may be required for sample preparation prior to assay. Consult manual or contact us for further details.
Document
Introducing the Fastin Assay Kit: Your Straightforward Solution for Elastin Quantification! Our user-friendly kit utilizes a dye-based method to measure elastin from in-vivo and in-vitro sources. It can be used to quantify various elastin forms, spanning from immature tropoelastin to mature, ‘insoluble’ elastin fibers.
Colorimetric Detection (513nm) (Endpoint)