Lipophilicity determination of some fully protected peptides and amino acids

1987 ◽  
Vol 23 (3) ◽  
pp. 184-188 ◽  
Author(s):  
T. Cserháti ◽  
B. Bordás ◽  
G. Ösapay
Keyword(s):  
Amino Acids ◽  
Protected Peptides

High-performance liquid chromatography of carba-analogues of oxytocin; a method for the determination of sulfides and sulfoxides in peptides

1980 ◽  
Vol 45 (11) ◽  
pp. 2927-2937 ◽  
Author(s):  
Michal Lebl
Keyword(s):  
Amino Acids ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Hydrogen Bromide ◽  
Disulfide Bridge ◽  
Reversed Phase ◽  
Sulfur Containing ◽  
Protected Peptides

Chromatographic properties of peptides derived from deamino-oxytocin, differing in the structure of the disulfide bridge region, were studied on a column with reversed phase. On the basis of chromatographic data the non-equivalence of the sulfur atoms in deamino-oxytocin was discussed. The analogues derived by oxidation or substitution of amino acids in the position 2 or 4 were also submitted to investigation. Rapid and selective oxidation of sulfide with periodate to sulfoxide, or the reduction of the latter with hydrogen bromide and acetone, was made use of for the determination of sulfide and sulfoxide in peptide containing sulfur-containing amino acid. The method was checked with free and protected peptides.

scholarly journals Rapid Organocatalytic Chirality Analysis of Amines, Amino Acids, Alcohols, Amino Alcohols and Diols with Achiral Iso(thio)cyanate Probes

2021 ◽  
Author(s):  
Eryn Nelson ◽  
Jeffrey S. S. K. Formen ◽  
Christian Wolf
Keyword(s):  
Amino Acids ◽  
Absolute Configuration ◽  
Rapid Determination ◽  
Amino Alcohols ◽  
Enantioselective Synthesis ◽  
Widespread Occurrence ◽  
Chiral Compounds ◽  
New Methods ◽  
The Absolute

The widespread occurrence and significance of chiral compounds does not only require new methods for their enantioselective synthesis but also efficient tools that allow rapid determination of the absolute configuration,...

scholarly journals THE DETERMINATION OF ARGININE IN THE PRESENCE OF OTHER AMINO ACIDS BY MEANS OF THE SAKAGUCHI REACTION

1939 ◽  
Vol 129 (1) ◽  
pp. 263-271
Author(s):  
Lloyd E. Thomas ◽  
Janet K. Ingalls ◽  
James Murray Luck
Keyword(s):  
Amino Acids

scholarly journals DETERMINATION OF AMMONIA EVOLVED FROM α-AMINO ACIDS BY peri-NAPHTHINDAN-2,3,4-TRIONE HYDRATE AND ITS m-NITRO DERIVATIVE

1950 ◽  
Vol 184 (2) ◽  
pp. 693-696
Author(s):  
Radwan Moubasher ◽  
Aly Sina ◽  
William Ibrahim Awad ◽  
Abd-El Mogid Othman
Keyword(s):  
Amino Acids ◽  
Nitro Derivative

scholarly journals Analysis of the Mycosporine-Like Amino Acid (MAA) Pattern of the Salt Marsh Red Alga Bostrychia scorpioides

Marine Drugs ◽  
2021 ◽  
Vol 19 (6) ◽  
pp. 321
Author(s):  
Maria Orfanoudaki ◽  
Anja Hartmann ◽  
Julia Mayr ◽  
Félix L. Figueroa ◽  
Julia Vega ◽  
...  
Keyword(s):  
Amino Acids ◽  
High Performance Liquid Chromatography ◽  
High Performance ◽  
Red Alga ◽  
Array Detector ◽  
Diode Array ◽  
Diode Array Detector ◽  
The Past ◽  
Specific Species

This study presents the validation of a high-performance liquid chromatography diode array detector (HPLC-DAD) method for the determination of different mycosporine-like amino acids (MAAs) in the red alga Bostrychia scorpioides. The investigated MAAs, named bostrychines, have only been found in this specific species so far. The developed HPLC-DAD method was successfully applied for the quantification of the major MAAs in Bostrychia scorpioides extracts, collected from four different countries in Europe showing only minor differences between the investigated samples. In the past, several Bostrychia spp. have been reported to include cryptic species, and in some cases such as B. calliptera, B. simpliciuscula, and B. moritziana, the polyphyly was supported by differences in their MAA composition. The uniformity in the MAA composition of the investigated B. scorpioides samples is in agreement with the reported monophyly of this Bostrychia sp.

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