M-fold Biotech was founded in March 2007 by Hans Kiefer as a successor company of m-phasys GmbH, a six year biotechnology company. The M-FOLD™ technology for the production of purified, functional membrane proteins is the basis of M-fold Biotech's activities. In October 2007, M-fold Biotech was aquired by Cambridge Isotope Laboratories, Inc. (CIL), an Andover, MA USA based specialty chemical manufacturer. CIL is the premier supplier of stable isotopes for research applications in proteomics, genomics, molecular biology, metabolic research, clinical and diagnostic research and ultra trace environmental analysis.