In Business Since 2004

Over 18 Years of Industry Experience

About Us - Who we are & what we do.


Cassia, LLC was founded in 2004 by James R. Williamson and Lincoln G. Scott, as a privately held biotechnology company and Contract Research Organization (CRO) located in San Diego, California. We specialize in green environmentally friendly chemo-enzymatic synthesis solutions for preparing stable-isotope labeled primary and seconday metabolites, proteins, nucleic acids, and their analogs. Currently, we’re located in the Sorrento Mesa Business Center, an eight building, 150,700 sq. ft. R&D businesspark in the Mira Mesa region of San Diego, California. We occupy approximately 1580 sq. ft. and are well equipped for both basic and applied research in molecular biology, biocatalysis and organic synthesis, as well as, protein and nucleic acid production.

Leveraging our unique core technology platforms and broad scientific expertise will bring responsible, cost-effective, and creative solutions to a variety of basic, translational, and biomedical research applications, such as: EPR, MS, NMR, assay development, and metabolic research. Contact us today to learn more about our biotechnology company and the products and services we provide.

Our Strenths and Customer Policy
  • Maintain the Highest Standards in Research and Service
  • Proven Track Record of Excellence in Nucleic Acids and Protein Chemistry
  • High Quality, Customer and In-House Research Driven Product Lines
  • Contribute Scientific Value Through Comprehensive Consultation
  • Competitive Prices
  • Quickly Able to Respond to New Technologies and Advancements
  • Follow Agreed Upon Schedules and Pricing
  • Protection of Confidential and Proprietary Information
  • Welcome Feedback from our Clients and Partners

Biocatalytic Solutons

Biocatalysis has attracted a great deal of attention as an emerging and transformational synthesis technology for the production of challenging target molecules. Traditionally, biotransformations are catalyzed by whole cells or cell extracts resulting in low substrate loading, modest yields, and high costs. These problems are only compounded if one wishes the target molecule to be isotopic labeled. One solution to these problems is the processing of total biomass. However, this too has significant drawbacks. With the revolution of cloning, rapid DNA sequencing of whole genomes, and protein expression technologies, practical biotransformations can now be accomplished in vitro using purified enzymes, leading to higher substrate loading, greater yields, and highly cost effective solutions.

Green Sustainable Chemistry

Catalysis is the single most important technology for reducing the consumption of organic chemicals and downstream waste. Enzyme catalyzed reactions are among the most efficient processes available to the organic chemist. Enzyme catalyzed reactions exhibit several important concepts of Green Chemistry, as enzymes are biodegradable, renewable, utilize water as the reaction solvent, and function efficiently under ambient temperatures and pressures. Cassia, LLC is committed to developing Green Chemistry processes for the production of all our fine chemicals.

A Diagram of a Computer System

Enzyme & Metabolic Engineering

The genomics and proteomics revolution has allowed Cassia, LLC to recapitulate entire biosynthetic pathways in vitro. By applying basic principles of molecular biology and enzymology, we can also quickly discover new substrates for enzymes. Our technology is well suited to the production of primary and secondary metabolites, as well as analogs. Using structural data, enzyme selection via mutant libraries, and site-directed mutagenesis, enzymes can be optimized for substrates not originally active. By integrating enzyme pathways in vitro, Cassia can reduce a difficult and/or expensive synthesis to one which can be cost effective. We have the unique ability to provide novel solutions to overcome existing manufacturing difficulties, as well as, reduce the cost of manufacturing processes. Moreover, Cassia, LLC has demonstrated manufacturing scale biocatalytic routes in vitro that currently provide significant savings over biomass manufacturing.

Contract Research & Development

Cassia, LLC is the creator of custom biotechnology. An increasing number of pharmaceutical companies are recognizing the multitude of benefits in establishing long-term outsourcing agreements with Contract Research Organizations (CROs). This partnership between a sponsor and the CRO is exemplified by the Full-Time Equivalent (FTE) agreement. In accordance with a mutually agreed upon FTE contract, Cassia, LLC can provide the client with a project team or exclusive product dedicated to the client’s needs for a specified period of time at a fixed rate per FTE. Cassia, LLC contractually guarantees not to work on the same project or objective for any other client for a mutually agreed period, and will not accept contracts from a potential client that would conflict with existing contracted projects or objectives of an existing client. If you need a custom designed product, or guaranteed sources, please contact Cassia, LLC for more information.