Fig. 4

Scanning electron microscopy images of hardwood pulp. Hardwood pulp SEM images after treatment with XsaEXLX1, DaqEXLX1, CmiEXLX2, NspEXLX1, and PcaEXLX1 shown at 10 and 2 µM resolution using 500 × and 2500 × magnification, respectively. The reference (without protein) and BSA-treated control samples are shown on the bottom. The major impact of microbial expansin treatments are highlighted in the 2 µm resolution images using phosphoric green frames