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New Products

J&K Scientific is committed to research and innovation. We are proud of our independent new product achievements as well as our development partnership with our customers and distributors. For many years J&K has invited companies to collaborate and share in market opportunities by contributing and co-developing products. Our product range grows every year with thousands of new compounds and derivatives added to our existing list of over 500,000 ultrafine materials, pharmaceutical chemicals, biochemicals and specialty chemical products for science and industry.
  • Latest Products
  • June 17 2017
  • October 01 2016
  • September 15 2016

Organic Linkers for MOFs

Metal Organic Frameworks (MOFs) are compounds that form a class of crystalline materials with periodic network structures. They consist of inorganic metal centers (metal ions or metal clusters) coordinated to organic linkers. Due to their multiformity, porosity, tailorability and large specific surface area, they have attracted immense attention in many research areas such as gas adsorption storage, molecular separation, catalysis, sustained-release drugs and photoelectricity.

J&K provides organic linkers with high purity and reliable quality that are applicable to MOFs to help chemists realize their innovative ideas.


Feathered Products:

structure Product no. description cas pricing
404950 Acetylenedicarboxylic acid, 98% 142-45-0 Pricing
380913 1,3-Adamantanedicarboxylic acid, 97% 39269-10-8 Pricing
328187 2-Aminoterephthalic acid, 99% 10312-55-7 Pricing
159403 1,2,4-Benzenetricarboxylic acid, 98% 528-44-9 Pricing
1415094 Biphenyl-3,3',5,5'-tetracarboxylic acid, 99% 4371-28-2 Pricing
620880 2,2'-Bipyridine-5,5'-dicarboxylic acid, 98% 1802-30-8 Pricing
507784 5-Hydroxyisophthalic acid, 99% 618-83-7 Pricing
493510 4,5-Imidazoledicarboxylic acid, 99% 570-22-9 Pricing
222263 1,4-Naphthalenedicarboxylic acid, 98% 605-70-9 Pricing
128551 Nitroterephthalic acid, 98% 610-29-7 Pricing
347052 1,10-Phenanthroline monohydrate, 99% 5144-89-8 Pricing
113992 2,6-Pyridinedicarboxylic acid, 99% 499-83-2 Pricing
495317 4-(4-Pyridyl)benzoic acid, 99% 4385-76-6 Pricing
348905 1,3,5-Triethynylbenzene, 98% 7567-63-7 Pricing
493973 2,4,6-Tris(4-carboxyphenyl)-1,3,5-triazine, 97% 61414-16-2 Pricing

Leiker - a new cross-linker for MS of large protein complexes

Chemical cross-linking of proteins coupled with mass spectrometry analysis (CXMS) has emerged as a powerful tool for the analysis of complex protein structures and protein-protein interactions. CXMS methods are less time-consuming and less demanding of sample purity than are traditional methods; this technology has thus been increasing in popularity. It does not typically work well, however, on complex samples that contain many different proteins, as it is difficult to separate the cross-linked peptides from the overwhelming amounts of non cross-linked peptides[1].

J&K Scientific, as a professional supplier, is proud to offer a new cross-linker called Leiker that addresses this limitation. Leiker makes possible the efficient and effective CXMS of large protein complexes.

Leiker enables effective enrichment of cross-linked peptides.

Figure 1. Leiker allowed near 100% enrichment of target peptides from a cross-linked ten-protein mixture diluted with increasing amounts of non-cross-linked E. coli lysates.

Crosslinking efficiency is higher than BS3.

Figure 2. CXMS analyses of E. coli and C. elegans lysates. The best protein-protein interaction cluster extracted from the Leiker-identified or BS3-identified (Yang et al., 2012) inter-links from E. coli whole-cell lysates.

Leiker-based quantitative CXMS analysis

Figure 3. Quantitative CXMS analysis of the L7Ae-RNA complex. Reciprocal labeling of RNA-free (F) and RNA-bound (B) L7Ae with [d0]/[d6]-Leiker.

Leiker-based quantitative CXMS analysis

[1] Tan and Li, et al. eLife 2016; 5:e12509
[2] Yang, et al. Nature Methods 2012; 9:904–906.


Feathered Products:

structure Product no. description cas pricing
2138035 Leiker, 95% Pricing
2322681 d6-Leiker, 95% Pricing


Nano-microspheres are particles that range in size from 5nm to 1000μm. They are widely used as drug carriers, enzyme carriers, conductive balls or magnetic beads in biological pharmaceuticals, food safety testing and medical diagnostics.

Easy surface modification
Large specific surface area
Excellent biocompatibility
Good stability in physiological medium
Related Categories
Stains and Dyes
Fluorescent Reagents

Feathered Products:

structure Product no. description cas pricing
1924547 Amino Fe3O4 magnetic beads , 0.1 - 0.2 μm, suspended in PBS buffer solution 1317-61-9 Pricing
914411 Amino Fe3O4 magnetic beads, 0.2 - 0.3 μm, suspended in PBS buffer solution 1317-61-9 Pricing
1924551 Amino polystyrene magnetic beads, 1 - 2 μm, suspended in PBS buffer solution Pricing
913531 Amino polystyrene microspheres, 4 μm, 2.5%(w/v)suspended in deionized water 9003-53-6 Pricing
943117 Carboxylated Fe3O4 magnetic beads, 99.8%, 0.2 - 0.3 μm, suspended in PBS buffer solution 1317-61-9 Pricing
943871 Hydroxy Fe3O4 magnetic beads, 0. 2- 0.3 μm, suspended in PBS buffer solution 1317-61-9 Pricing
1924550 Hydroxy Fe3O4 magnetic beads, 0.1 - 0.2 μm, suspended in PBS buffer solution 1317-61-9 Pricing
952804 Orange fluorescent microspheres, 5 μm, 1%(w/v)suspended in deionized water Pricing
930141 Polystyrene microspheres, 0.1 μm, 2.5%(w/v)suspended in deionized water 9003-53-6 Pricing
1927295 Red fluorescent microspheres, 1 μm, 1%(w/v)suspended in deionized water Pricing
775567 Silica microspheres, 1 μm, 2.5%(w/v)suspended in 50% ethanol solution 60676-86-0 Pricing

Reagents for Protein Structure Analysis

With the completion of the Human Genome Project (HGP), the focus of biological science has turned from Genomics to Proteomics. The investigation of protein structure and function has emerged as an exciting research area in the post-genome era. Such as incorporation of selenium atoms into proteins has been a staple method for protein crystallography. Methionine (Met) can be replaced by Selenomethionine (SeMet) in this process by means of isomorphous substitution without any negative effect.


Feathered Products:

structure Product no. description cas pricing
114587 L-Selenomethionine, 98% 3211-76-5 Pricing
929073 Dabsyl chloride, 98%, derivatization grade 56512-49-3 Pricing
164579 5-Dimethylamino-1-naphthalenesulfonyl chloride, 98% 605-65-2 Pricing
158799 Poly(ethylene glycol), average M.W. 6,000 25322-68-3 Pricing
105893 Sodium dodecyl sulfate, 99%, for biochemistry 151-21-3 Pricing
407715 Tris(hydroxymethyl)aminomethane, 99% 77-86-1 Pricing

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