Certain features of will be down for maintenance Saturday afternoon/evening, February 24th starting at 3:00 pm CT until 9:00 pm CT.

Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Translational Research Solutions

Clinical Development

Fit for GMP

Bring superior transparency to your supply chain with critical raw materials of known origin and history.


Custom Cell Line Engineering

Chinese Hamster Ovary (CHO) cell lines continue to be the predominant cell line of choice for biopharmaceutical manufacturers. Sigma-Aldrich CHOZN(R) products and services based on zinc finger nuclease gene-editing technology are tailored to your project. As such, we offer the first ever commercially available cell line platform for rapid simple selection and scale up of clones for the production of recombinant proteins. Our CompoZr Zinc Finger Nucleases allow you to create your own novel CHO cell lines in house.

Custom Cell Line Engineering

Contract Manufacturing Services

Contract manufacturing of starters and intermediates, antibody drug conjugates and virus-derived products, all supported by industry-leading analytical services.

Contract Manufacturing Services