Enzyme affinity towards raw samples. CLSM images, roughly 1 mm2, of raw leaves (A) and stems (B) incubated with a fluorescently labelled endoglucanase (1) and exoglucanase (2). Enzyme adhesion is not quantitatively comparable, only relative. Blue colour indicates off-scale high adhesion. Note the relatively high affinity to parenchyma cells and low affinity to epidermal cells that cover the stem rind and both sides of the leaf.