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Introducing Amsphere™ A3 

A next generation Protein A chromatography resin.

Amsphere A3 is a next generation Protein A chromatography resin for advanced protein separation in downstream processing of therapeutic antibodies manufacturing.

Besides an outstanding high capacity, Amsphere A3 has an overall improved process robustness, flow characteristics, optimized impurity removal, productivity and resin lifetime.

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Our Products

We offer a variety of life sciences products across all stages of biopharmaceutical development and manufacturing 

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Amsphere A3

A next generation, high capacity protein A chromatography resin for advanced protein separation in downstream processing.

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JSR Chromassette Icon Blue


An innovative chromatography platform that helps improve the operational efficiency & productivity of your purification processes.
Product under development.

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JSR Magnosphere Icon Blue


Hydrophilic & hydrophobic magnetic microparticles which can be used for life science research & in vitro diagnostic use.

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Blocking agent composed of 100% chemically synthesized polymers, devoid of the safety & purity issues of biological blocking reagents.

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Uniform-sized polystyrene latex particles for agglutination tests in clinical diagnostics with a variety of sizes & surfaces available.

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JSR Tetramer Icon Blue


MBL provides biomarker discovery for companion and in vitro diagnostics.

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Our Services

Our affiliates provide a wide range of research, diagnostic, & bioprocess services.

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Contract Research

Crown Bio is a contract research & translational technology company making precision medicine a reality.

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Cell Line Development

Selexis SA is the global leader in cell line development with best-in-class modular technology & highly specialized solutions.

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Contract Manufacturing

KBI Biopharma is a contract development and manufacturing organization for the 21st Century.

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Yao Ying




Join Ying Yao, JSR’s Applications Scientist, for a webinar on comparative purification analysis of Fc-fusion proteins.

In this webinar, DBC and purification properties of four commercially available Protein A chromatography resins are compared using four Fc-fusion proteins. Significant factors affecting DBC are particle size, binding capacity, and pore diffusion. The analysis of these factors showed how Amsphere A3 was able to out-perform the other three resins for three out of the four molecules tested. Join us to learn about how Amsphere A3 can support your Fc-fusion protein purification!



Latest News

Crown Bioscience Invests in Commercial Leadership

New Vice President to lead North America and Europe Business Development

San Diego, California, July 20, 2021 – Crown Bioscience, a JSR Life Sciences company, today announces the appointment of Alex Slater as Vice President of Business Development, North America and Europe. In this role, Mr...

Selexis and KBI Biopharma Enter into Agreements with Selexis and KBI Biopharma Enter into Agreements with Immatics for Integrated Approach to Advance Immatics TCR Bispecific Program Towards IND

Geneva, Switzerland, and Durham, NC June 29, 2021Selexis SA and KBI Biopharma (KBI), both JSR Life Sciences companies, announced today that they have signed service agreements with Immatics N.V. (NASDAQ: IMTX; “Immatics”), a clinical-stage biopharmaceutical company active in the discovery and...

KBI Biopharma Enters Commercial Manufacturing Agreement with AM-Pharma to Prepare for the Commercial Launch of Lead Program in Acute Kidney Disease

Agreement supports future commercial manufacturing for AM-Pharma’s recombinant alkaline phosphatase program

Utrecht, The Netherlands and DURHAM, NC – June 17, 2021 – KBI Biopharma, Inc. (KBI), a JSR Life Sciences company, and AM-Pharma, an emerging leader focused on the development of therapeutics...

Webinar: Developing an Effective CIP Strategy for your Protein A Step


Extending the lifetime of Protein A resin during the downstream process of manufacturing a biomolecule can have significant positive effects on your process economy. In this webinar, NaOH in combination with ethylene glycol, ethanol, IPA, and thioglycerol are examined. Bacterial challenge, soaking, and life cycle data on Amsphere A3 resin using PAA will be presented.



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Featured Resources

Looking for a CDx Partner in Japan?


MBL in Japan is a one stop shop. MBL is #1 for new IVD medical reimbursement approvals in Japan with an Extensive KOL Network required for approvals.


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