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CHOZN® CHO K1 Host Cell Line

Suspension-adapted in CD media

Quality Level


CHOK1 cell line derived from ECACC CHO K1

shipped in

dry ice

storage temp.


General description

CHO-K1 cells derived from ECACC CHO K1 and adapted to suspension and serum-free, chemically defined media. Cells are cGMP banked in chemically defined, animal component-free EX-CELL® CD CHO Fusion medium.
A subclone of the parental CHO cell line, which was derived from the ovary of an adult Chinese hamster. Cells require proline due to the absence of the gene for proline synthesis, the block in the biosynthetic chain lies in the step converting glutamic acid to glutamine γ serialdehyde. They undergo morphological changes in response to cholera toxin.

Cell Line Origin

Hamster Chinese ovary. The parental CHO-K1 cell line was originated by Puck in 1957.

Physical form

CHOZN CHO K1 cells are provided to customers in vials containing 1 mL at 107 cells/mL. Cells are banked in EX-CELL CD Fusion medium containing 4mM L glutamine and 7% DMSO.

Legal Information

The CHOZN CHO K1 cell line is sold for research use only. For use of this cell line in a commercial process, a commercial license must be taken.
CHOZN is a registered trademark of Sigma-Aldrich Co. LLC
EX-CELL is a registered trademark of Sigma-Aldrich Co. LLC

Storage Class Code

12 - Non Combustible Liquids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Ernst R Werner et al.
Journal of lipid research, 59(5), 901-909 (2018-03-16)
Plasmanylethanolamine desaturase (PEDS) (EC introduces the 1-prime double bond into plasmalogens, one of the most abundant phospholipids in the human body. This labile membrane enzyme has not been purified and its coding sequence is unknown. Previous assays for this...
Weiyi Liu et al.
Biotechnology progress, 37(1), e3061-e3061 (2020-08-05)
Antibody-dependent cellular cytotoxicity (ADCC) is the primary mechanism of actions for several marketed therapeutic antibodies (mAbs) and for many more in clinical trials. The ADCC efficacy is highly dependent on the ability of therapeutic mAbs to recruit effector cells such...
Jiah Kim et al.
The Journal of cell biology, 219(1) (2019-11-24)
Many active genes reproducibly position near nuclear speckles, but the functional significance of this positioning is unknown. Here we show that HSPA1B BAC transgenes and endogenous Hsp70 genes turn on 2-4 min after heat shock (HS), irrespective of their distance...

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