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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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Want to accelerate your novel therapies or innovative technologies?

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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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MBL International

Providing high-quality products & solutions to advance life science research in the drug discovery & development fields.

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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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WEBINAR:Evaluation & Application of Amsphere A3 in Downstream Purification Processes


KBI Biopharma Inc. has developed a rapid and streamlined workflow for comparing capacity and product quality from different ProA resin candidates as part of the larger downstream purification process development effort. This workflow has been utilized to compare Amsphere A3 resin to other high-performance Protein A resins available on the market since 2016. This presentation will cover the results of these comparisons in terms of ProA resin capacity and eluate product quality as well as later development data comparing viral clearance results for these different affinity resins.


Latest News

JSR Life Sciences Launches Corporate Venture Fund to Foster Investment in New Companies and Innovative Technologies

Company Appoints Seasoned Life Science Investment and Business Development Executive Dr. Jason Yuanxin Zhang to Lead the Fund

SUNNYVALE, California, March 23, 2021 – JSR Life Sciences, LLC today announced the launch of its ‘JSR Life Sciences Corporate Venture Fund.’ As part of a continued effort...

JSR Life Sciences Completes Integration of MBL into its Family of Companies

SUNNYVALE, California, March 16, 2021 – JSR Life Sciences, LLC announced that the JSR Corporation has finalized the acquisition of all outstanding shares in MEDICAL & BIOLOGICAL LABORATORIES CO., LTD. (MBL). As a result, MBL is a wholly owned subsidiary and affiliate of the JSR Life Sciences...

CrownBio and JSR Life Sciences Partner with Cambridge Quantum Computing to Leverage Quantum Machine Learning for Novel Cancer Treatment Biomarker Discovery

The partnership is one of the first commercial applications of quantum technology for bioinformatics

SUNNYVALE, California, CAMBRIDGE, UNITED KINGDOM, February 24, 2021 – Crown Bioscience (CrownBio), JSR Life Sciences and Cambridge Quantum Computing (CQC) today announced a partnership agreement to...

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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