Immunofluorescence labelling of hardwood bleached kraft pulp fibers (left) and  softwood bleached kraft pulp fibres (right). Image courtesy of Dr. Vinay Khatri (post-doctoral researcher) in Dr. Jack Saddler lab (Dept of Wood Science). The images were acquired with the Olympus FV1000 confocal microscope. Green fluorescence represents the crystalline cellulose and red fluorescence represents the amorphous cellulose in the fibers.