Certain features of will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Cloning and Expression

Sigma offers many products for Molecular Cloning and Protein Expression workflows, from cloning kits and vectors through plasmid production and transfection. Explore our thousands of products, providing solutions to your research challenges every step of the way.