Documents Savoirs Simple high-cell density fed-batch technique for high-level recombinant protein production with Pichia pastoris: Application to intracellular production of Hepatitis B surface antigen Gurramkonda Chandrasekhar, Adnan Ahmad, Gäbel Thomas, Lünsdorf Heinrich, Ross Anton, Nemani Satish, Swaminathan Sathyamangalam, Khanna Navin, Rinas, Rinas Ursula