Introduction
Diamond AB, specialized at producing diagnostic kit, is currently developing a new product based on the catalytic activity of the enzyme β-gal. The company is searching for production pipeline, based on a provided specific E.coli strain, to produce the enzyme at given specific requirements according to quantity and quality. The final product should reach a minimum value of 50 000 kU, with the concentration of 8-12 g/l, and with a purity level of at least 95% tetrammeric protein relative other proteins