Fig. 3
From: Economical production of Pichia pastoris single cell protein from methanol at industrial pilot scale
Changes in cell wall and colony morphology of starting strain X-33 at 30 °C and the evolved strain HTX-33 at 33 °C in 0.5% methanol minimal medium. a, Representative TEM images of cell wall thickness; b, Representative SEM images of cell wall surface. The surface of the cell wall is partially magnified; c, Changes in colony morphology. Representative images are from three independent experiments