Abstract: Methods and composition related to genetically modified cells for producing intracellular biological products are provided. A method can include genetically engineering of cells to express a thermostable protease. As one advantage, the cells may be suitable for producing biological products with improved efficiency.

Abstract: Disclosed is a wavelength conversion material for use in a photo-bioreactor for growing phototrophic organisms. The wavelength conversion material includes an organic fluorescent dye and a polymeric matrix, wherein the organic fluorescent dye is solubilized in the polymeric matrix. The wavelength-conversion material is capable of absorbing light comprising a wavelength of 280 to 650 nm and emitting the absorbed light at a wavelength of 400 to 800 nm.

Abstract: A method comprising (a) introducing a plurality of at least one phototrophic organism to a culture media to create a first mixture; (b) subjecting the first mixture to conditions suitable for growth of the phototrophic organism in the presence of a wavelength converting material to produce a concentrated mixture having a first cell titer; (c) diluting the concentrated mixture to produce a diluted mixture having a second cell titer; and (d) subjecting the diluted mixture to conditions suitable for growth of the phototrophic organism in the absence of the wavelength converting material.