Regulatory associations between the metabolism of sulfur-containing amino acids and xanthan biosynthesis in Xanthomonas campestris pv. campestris B100.

The γ-proteobacterium Xanthomonas campestris pv. campestris (Xcc) B100 synthesizes the exopolysaccharide xanthan, a commercially relevant thickening agent produced commonly by industrial scale fermentation. This work was inspired by the observation that methionine is an inhibitor of xanthan formation in growth experiments.

Effects and Consequences of Being an OSCE Examiner in Surgery-A Qualitative Study.

Objective: Even though objective structured clinical examination (OSCE) is a well-investigated format for competency-based practical examination, only a few studies have explored the motivations of OSCE examiners and their opinions, both positive and negative, toward being an examiner. The aim of this study was to gain insights into the views of OSCE examiners using semi-structured interviews.

Design: Surgical OSCE examiners were queried at two medical faculties in Germany via semi-structured interviews.

Prevalence of Helicobacter pylori Infection in Patients with Minimal Hepatic Encephalopathy.

Background: Ammonia is a critical factor in the pathogenesis of minimal hepatic encephalopathy (MHE). Most of the ammonia is from bacterial production in the intestinal tract. Non-absorbable antibiotics and non-absorbable disaccharides are therefore the therapy of choice.

Characterization of the pyrophosphate-dependent 6-phosphofructokinase from Xanthomonas campestris pv. campestris.

Xanthomonads are plant pathogenic proteobacteria that produce the polysaccharide xanthan. They are assumed to catabolize glucose mainly via the Entner-Doudoroff pathway. Whereas previous studies have demonstrated no phosphofructokinase (PFK) activity in xanthomonads, detailed genome analysis revealed in Xanthomonas campestris pathovar campestris (Xcc) genes for all Embden-Meyerhof-Parnas pathway (glycolysis) enzymes, including a conserved pfkA gene similar to 6-phosphofructokinase genes.