Possible Interaction: Cysteine and Glucose

“Results Gaseous sulfur-containing compounds such as methanethiol and hydrogen sulfide were produced when glucose was allowed to react with methionine or its metabolites homocysteine or cysteine.”

“Indeed the endotracheal instillation of the particles into hyperglycemic rats decreased the glucose levels rapidly while delivery of cysteine triggered a further drop of glucose implying acceleration of insulin release from the carrier.”

“ Glucose can be detected not only by naked eyes (from yellow to red) but also by spectrophotometer … the concentration range of 5-70μM, with detection limit of 3μM. More importantly, we found that l-cysteine added in the system can markedly improve the selectivity for the detection of glucose.”

“At pH 3, however, Cys reacted with both glucose and rhamnose to produce unidentified compounds that increased the visible absorbency.”

“It is also suggested that GSH and L-cysteine increase the sensitivity of β-cells to the stimulatory action of tolbutamide and/or glucose.”

“The cysteine content of a solution decreases markedly in the presence of oxygen and/or glucose due to formation of various derivatives, such as cystine and D-glucocysteine.”

“Nitrogen and sulfur co-doped porous carbon spheres (NS-PCSs) were prepared using L-cysteine to control the structure and functionalization during the hydrothermal reaction of glucose and the subsequent activation process.”

“The measurement of glucose , xylose, arabinose, and cellobiose at the 3.7-12.4 mM range in the presence of 20 mM cysteine resulted in an overestimated concentration of 34.8-50%.”

“Method: In this technique, two cysteines were introduced in GGBP and one cysteine is rendered inaccessible by the presence of glucose , thus allowing sequential attachment of two different thiol-reactive reagents.”

“The effect of added cysteine on the test was suppressed by the addition of glucose.”