CellCover was developed for fast “one step” stabilizing of biomolecules in life science research. CellCover is a non-toxic formulation for protecting DNA, RNA and protein in human and animal cells solid tissues, including tumors and cultured cells (adherent, suspension, spheroids). 

  • Stabilize RNA and protein simultaneously for several days
  • Cells maintain close to vivo morphology without chemical crosslinking of biomolecules.
  • No freezing necessary 

How it works

As soon as cells get exposed to CellCover their metabolic state is frozen without applying low temperatures- liquid frozen. Synthesis and turnover of bio-molecules are stalled. This includes instant disruption of cellular degradation pathways. Chemical degradation is inhibited with CellCover as well, both leading to exceptional stabilization of DNA, RNA and protein. 

The Benefits

If treated with CellCover liquid freezing, cells grown on almost any substrate maintain in vivo morphology without chemical crosslinking of biomolecules.

Compared to conventional formaldehyde fixation, formalin sensitive epitopes are readily accessible for antibodies in immunohistochemical experiments.

High RIN Values

Even integrity of high molecular weight RNA is protected (e.g precurser rRNA, which are normally degradat sed after applying commonly used standards procedures) - and there is no need to hurry!

1.1: Standard RIN Analysis of RNA
1.2: Cultured cells (SKMel-28) stored for up to 12 days in CellCover. RNA was isolated and its integrity was analysed with standard procedures. Results show a stable RIN value of 10 from first till last day of the time course. 

The Applications

A unique and special feature of CellCover liquid freezing is that you can perform additional molecular analysis on cells already analysed on morphological or molecular level: DNA, RNA (with high RINs) or protein can be isolated for subsequent applications after initial IHC, ICC or FACS analyses. 

These unique properties now enable new types of analyses of cellular functions. With CellCover liquid freezing, subpopulations of cells can be separated according to known properties by flow cytometry and subsequently analysed for gene expression profiles on RNA or on protein-level. Thus, with CellCover liquid freezing it is easy to link transcriptome and proteome of a given cell population.

CellCover Laboratory
CellCover CK Pan Vs CD31

(Left: CK Pan, Right: CD31)


CellCover stabilizes cells in suspension, biopsies or tissue. CellCover is compatible with morphological analyses and staining procedures, with immunocytochemistry and flow cytometry.

CellCover Double Analysis

(Initial protein analysis & RNA isolation)

Double Analyses

Cells treated with CellCover maintain morphology for several days. Epitopes are protected and can be stained later. Highly intact RNA can be isolated from cells in which protein has already been stained by immunolabeling. Quality of RNA after CellCover protection: Cells have been immunostained for protein, RNA was isolated subsequently.

CellCover Vs Formalin

(Left: Formalin, Right: CellCover)


CellCover liquid freeze effect allows visualization of formalin sensitive epitopes like Vimentin, enabling new insights in cells structure and architecture.

The Opportunities

In comparison to commonly used molecular biological methods, CellCover adds following new analytical tools to bio-molecular research:

  • Stabilize RNA and Protein simultaneously for several days, without doubt of molecule integrity
  • Reliable analysis HMW-RNA and low stability enzymes even after day of storage
  • Apply immunohistochemistry on formalin sensitive epitopes
  • Apply in situ hybridization for analysis of gene expression
  • Store cells conveniently for several days without change of protein or RNA expression profile or change in cells morphology as found with methanol
  • Isolate subpopulations by flow cytometry based on protein labelling and perform subsequent transcriptome and/or proteome (MALDI) analyses. 

CellCover Opportunities

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