... and their elaboration at molecular and genetic levels. This Commentary emphasizes the integration of discrete molecular players and processes (including paracellular absorption) that, in combination, determine the overall epithelial absorption of key nutrients (e.g. sugars, amino acids) and putative anti-nutrients...

...Edwin R. Price; Katherine H. Rott; Enrique Caviedes-Vidal; William H. Karasov Flying vertebrates have been hypothesized to rely heavily on paracellular absorption of nutrients to compensate for having smaller intestines than non-flyers. We tested this hypothesis in an insectivorous bat ( Myotis...

... the course of the experiment. Using l -arabinose absorption as a proxy for the portion of glucose absorption that is paracellular, we calculated the percent paracellular absorption as 100×(arabinose absorption)/(glucose absorption). This likely overestimates the proportion of glucose that is paracellular...

.... interpreted the findings. E.R.P., L.J.R., A.G. and W.H.K. drafted and revised the manuscript. COMPETING INTERESTS No competing interests declared. 12 3 2013 19 7 2013 © 2013. Published by The Company of Biologists Ltd 2013 claudin paracellular absorption cold arabinose...

... also had a slightly reduced capacity for absorption of a glucose analogue (3- O -methyl- d -glucose) transported simultaneously by both carrier-mediated and non-mediated mechanisms. Increased paracellular absorption coupled with extended digesta retention time may thus allow migratory blackcaps...

... -glucose. This effect may be especially pronounced in species in which paracellular absorption is relatively more important, and may thus lead to l / d ratios >1. Secondly, because of this structural difference, 3-OMG has a lower affinity for glucose transporters compared with d -glucose( Ikeda et al...