Our Technology

Our technology is based on using engineered Caf1 proteins produced recombinantly in bacteria to mimic the action of bioactive proteins such as extracellular matrix (ECM) proteins and growth factors.

MarraBio Caf1 technology explained


Caf1 proteins are produced by bacteria where they form polymers. These protect the bacteria from the immune system by forming a non-stick coat on their surfaces.


Each individual Caf1 protein is small but they associate to form long, flexible and highly stable polymers. The polymers are also bioinert, in that cells don’t stick to or interact with them.


Bioactive peptides can bind to cell receptors to trigger particular bioactivities. These short peptides can be genetically encoded into the caf1 gene. When expressed by bacteria, these modified Caf1 modules form polymers. The bioactivity of these polymers is determined by the peptide they contain.


By using heat as a stimulus, Caf1 polymers can be broken apart and recombined. This allows modules with different bioactivities to be easily combined into a single material.

Caf1 - Features & Benefits

Ease of handling

Highly stable

A melting temperature above 80˚C means that it can be shipped and handled easily at room temperature and remains stable in long term cell culture at 37˚C.
Free from animal material

Free from animal material

Caf1 is free from animal materials as it is produced by bacterial fermentation.
Never be short of sample

Can be exquisitely defined

The wild-type material is non-adhesive and does not interact with cells, so cells only respond to the encoded bioactive motif.
Characterised and defined

Characterised and defined

So you know exactly what is being added to the cell culture medium and how cells will respond.

Multiple bioactive modules

Highly modular

Different modules can be easily combined to form multifunctional materials (such as combining ECM and growth factor modules in a single material).

Caf1 Scalable

Scalable production

Caf1 is produced scalably and in high yield, so can match your requirements.


Caf1 has been developed as a cell culture supplement and can be used to make your cell biology research quicker and easier. We are currently developing versions that can be used in food and therapy applications, as well as in 3D tissue culture.

Caf1 Products

We have many versions of Caf1 that we have produced. Caf1 mimics of Fibronectin and Vitronectin can be purchased here. Caf1 mimics of laminin, collagen, TGF-β and FGF2 are in development.