The Mechanism by Which Arabinoxylanases Can Recognize Highly Decorated Xylans

The Mechanism by Which Arabinoxylanases Can Recognize Highly Decorated Xylans*

The enzymatic degradation of plant cell walls is an important biological process of increasing environmental and industrial significance. Xylan, a major component of the plant cell wall, consists of a backbone of β-1,4-xylose (Xylp) units that are often decorated with arabinofuranose (Araf) side chains. A large penta-modular enzyme, CtXyl5A, was shown previously to specifically target arabinoxy...

Can children recognize pride?

Recent research has shown that pride, like the "basic" emotions of anger, disgust, fear, happiness, sadness, and surprise, has a distinct, nonverbal expression that can be recognized by adults (J. L. Tracy & R. W. Robins, 2004b). In 2 experiments, the authors examined whether young children can identify the pride expression and distinguish it from expressions of happiness and surprise. Results ...

The mechanism by which plethora suppresses erythropoiesis.

E RYTHROPOIETIN is believed to be the prime physiologic regulator of erythropoiesis.1 It is generally assumed that erythropoietin production is chiefly controlled by the demands of tissues for oxygen relative to their oxygen supply.1 According to this hypothesis transfusion-induced polycythemia results in suppression of erythropoietin production ( and consequently of erythropoiesis ) by virtue ...

The Mechanism by which Neurofibromin Suppresses Tumorigenesis

The mechanism by which glyceraldehyde inhibits glycolysis.

In 1929 Mendel (1) discovered that nL-glyceraldehyde in concentrations of 1O-3 M almost completely inhibited the anaerobic formation of lactic acid from glucose by rat sarcoma. Glyceraldehyde, even in much higher concentrations, did not appreciably affect the respiration of normal liver, kidney, and brain, or of malignant cells. Somewhat later Mendel, Bauch, and Strelitz (2) found that the addi...