Biomimetic reflectin protein whitener produced via precision fermentation

Overview

Terraferma is developing a protein-based whitener derived from reflectin, the high-refractive-index protein responsible for the bright white appearance of squid and cuttlefish leucophores. In nature, reflectin self-assembles into disordered sub-micron granules that scatter visible light broadly and incoherently, producing whiteness and opacity through the same Mie-scattering physics as titanium dioxide (TiO₂), but without any metal oxide content.

This whitener is produced by precision fermentation in food-grade yeast, with no animal-derived inputs, and is formulated into particles engineered above 100 nm to remain outside nanomaterial definitions. The material is designed for both surface coating and in-matrix mass whitening applications, offering formulators a sustainable, organic alternative to mineral- and petrochemical-based whitening agents.

Technical specifications

• Reflectin protein core: the only known protein evolved specifically to scatter white light, providing a literature-backed physical rationale rather than a repurposed generic protein.
• Mie-scattering mechanism: disordered, high-refractive-index granules scatter all visible wavelengths incoherently, mimicking the optical behavior of TiO₂ without metal oxides.
• Particle engineering: particles are sized above 100 nm and tuned for peak visible-light scattering, with adjustable size, porosity, and void structure to raise scattering efficiency and lower required dosage.
• AI-guided fermentation: the proprietary CATTAGA platform uses machine learning and synthetic biology to design and test microbial strains in silico, directly targeting reflectin's historically low expression yields.
• Food-grade pathway: produced in food-grade yeast with an animal-free process, supporting a pathway toward GRAS status.
• Application flexibility: suitable for surface coatings and in-matrix mass whitening, with ongoing evaluation of pH, texture, sensory neutrality, and process and thermal stability.

Technology readiness level

The technology is currently at an early-to-mid development stage. A staged validation plan is underway, beginning with a feasibility proof of concept (~3–6 months) that includes expression and purification of reflectin, particle formation and characterization, and benchmarking against a TiO₂ control in a model matrix to generate go/no-go data on scattering performance and loading. Subsequent phases (~12–24 months) will optimize particle structure, test across representative matrices, and assess stability and sensory properties, followed by scale-up of production, purification refinement, and advancement toward food-grade GRAS status. Milestones and matrix selection are defined jointly with development partners.