scholarly journals Appendix 2 Structures of the Common Amino Acids at Neutral pH

Keyword(s):  
2009 ◽  
Vol 20 (11) ◽  
pp. 2116-2123 ◽  
Author(s):  
Scott Gronert ◽  
David C. Simpson ◽  
Keyanna M. Conner

Author(s):  
Sumukh Deshpande ◽  
Saikat Kumar Basu ◽  
Pooja Purohit

We have surveyed polypeptides with the optimal conformations of nests which are the common anion-binding motifs comprising 8% of the amino acids which are characterized by a structural depression or a hole. Using automated bioinformatics algorithm, novel ring structure of the nest has been found. Using automated algorithm, models of polypeptides were made in-silico (computationally) and oxygen atoms are inserted along the extension of the NH groups. These sophisticated algorithms allow insertion of atoms along the NH group at the correct distance which causes extension of the group thus forming hydrogen bond. Optimal conformations of these structures are found from these customized models. This study chapter provides a demonstration of an important discovery of optimum conformations of RL and LR nests by the use of sophisticated bioinformatics automation pipeline and a unique application of automation and control in bioinformatics.


Author(s):  
M A Edwards ◽  
S Grant ◽  
A Green

We have, in this paper, highlighted some of the common problems in amino acid analysis in our experience and listed the possible causes for increases in specific amino acids in urine—together with guidance on appropriate follow-up investigations.


Marine Drugs ◽  
2008 ◽  
Vol 6 (2) ◽  
pp. 147-163 ◽  
Author(s):  
Manfred Klisch ◽  
Donat Häder
Keyword(s):  

1977 ◽  
Vol 233 (4) ◽  
pp. E286
Author(s):  
D L Kaminski ◽  
M J Ruwart ◽  
M Jellinek

This study evaluates the structure-function relationships of the C-terminal peptide fragments of gastrin and cholecystokinin (CCK) in the biliary system and the stomach. Dogs with chronic biliary and gastric fistulas were used. Administration of the common fragments of CCK and gastrin with four and five amino acids and the active fragments of CCK with six through eight amino acids without sulfation of tyrosine in position 7 failed to alter hepatic bile flow from control values while significantly stimulating gastric hydrogen ion output. Administration of the seven and eight amino acid peptide fragments of CCK with sulfation of tyrosine in position 7 significantly increased hepatic bile flow. Administration of the sulfated octapeptide with 4 microgram/kg per h of nonsulfated octapeptide did not result in the inhibition of the choleresis produced by the sulfated peptide. The gastric hydrogen ion response produced by the administration of the nonsulfated and sulfated peptide was equal to that of the nonsulfated peptide alone. These results suggest that in the biliary system the receptor is highly specific as sulfation of the peptide fragment of CCK is essential for combining with the receptor, whereas in the stomach the receptor has little specificity and combines with all of the peptide fragments evaluated.


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