Description Phase Bioscience is a biotechnology firm that has developed a technology utilizing genetically-engineered biopolymer peptides (ELPs) that changes solubility (from a liquid to a solid and back) based on the temperature and the salt content of the solution. Known as deltaPhase, Phase Bioscience's ELPs are designed to be used by pharmaceutical researchers in drug discovery processes and in life science applications, including recombinant protein purification (isolating a particular protein in a solution) and enzyme biocatalysts (isolating a particular recombinant enzyme in a solution).