scholarly journals The assimilation of amino-acids by bacteria. 11. The relationship between accumulation of free glutamic acid and the formation of combined glutamic acid in Staphylococcus aureus

1951 ◽  
Vol 48 (3) ◽  
pp. 290-297 ◽  
Author(s):  
E. F. Gale
Keyword(s):  
Amino Acids ◽  
Staphylococcus Aureus ◽  
Glutamic Acid ◽  
The Relationship

scholarly journals The Amino Acid Contents in Mangrove Rhizophora mucronata Leaves in Asahan, North Sumatra, Indonesia

2020 ◽  
Vol 151 ◽  
pp. 01047
Author(s):  
Sri S. Ningsih ◽  
Dafit Ariyanto ◽  
Dian Puspitasari ◽  
Anuraga Jayanegara ◽  
Hamim Hamim ◽  
...  
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Glutamic Acid ◽  
Amino Acid Content ◽  
Principal Component ◽  
Mangrove Plant ◽  
Relationship Analysis ◽  
The Difference ◽  
Amino Acid Contents ◽  
The Relationship

Amino acids are important components of mangrove plant metabolisms. The aim of this study was to determine the relationship of mangrove R. mucronata leaf colors to the amino acid content. This study was conducted between March to August 2019. The leaves were taken 50 g. The assessment of Amino acids was conducted using UPLC Waters Acquity Class H with PDA Detector. The principal component analysis (PCA) was used to determine the relationship analysis between R. mucronata leaf colors and amino acid concentrations. The largest content was L glutamic acid with a green leaf content of 6139.57 ± 694.17 mg/kg and yellow leaf content of 6105.013 ± 113.2058 mg/kg. The results of PCA 1 showed that the influential amino acids were L-threonine (0.94), L-tyrosine (0.96), L-alanine (0.92), L-vanin (0.93), and PCA 2 showed glutamic acid (0.91). These results indicated that the difference in mangrove leaf colors affects the amino acid contents in the leaves.

The Proteins of Hevea Brasiliensis. 1. Analysis of a Product Isolated from Dried Latex

1940 ◽  
Vol 13 (4) ◽  
pp. 722-727
Author(s):  
G. R. Tristram
Keyword(s):  
Amino Acids ◽  
Glutamic Acid ◽  
Aspartic Acid ◽  
Total Protein ◽  
Hevea Brasiliensis ◽  
Dicarboxylic Acids ◽  
Calcium Salts ◽  
Basic Amino Acids ◽  
Relationship Of ◽  
The Relationship

Abstract A protein has been isolated from dried Hevea latex and analyzed for amido-nitrogen, tyrosine, tryptophan, cystine, methionine, the basic amino-acids and the dicarboxylic acids. The dicarboxylic acids were estimated in 4.0 grams of protein, experiments on casein having shown that, under such conditions, approximately 90% of the glutamic acid and aspartic acid was recovered as crystalline derivatives. It was also found possible to estimate arginine and lysine in the filtrate from the calcium salts of the dicarboxylic acids. The protein is, in many respects, similar to the proteins found in leaves of other plants (Table IV). Further work is in progress to investigate the relationship of the isolated protein to the total protein of latex.

scholarly journals N-Heterocyclic Carbene-Catalyzed Random Copolymerization of N-Carboxyanhydrides of α-Amino Acids

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3674
Author(s):  
Kuen Hee Eom ◽  
Seokhyeon Baek ◽  
Il Kim
Keyword(s):  
Amino Acids ◽  
Glutamic Acid ◽  
Primary Structure ◽  
Reactivity Ratio ◽  
Synthetic Polypeptides ◽  
Random Placement ◽  
Natural Peptides ◽  
The Relationship ◽  
Method Show

Synthetic polypeptides prepared from N-carboxyanhydrides (NCAs) of α-amino acids are useful for elucidating the relationship between the primary structure of natural peptides and their immunogenicity. In this study, complex copolypeptide sequences were prepared using a recently developed technique; specifically, the random copolymerization of l-alanine NCA with NCAs of l-glutamic acid 5-benzylester (Bn-Glu NCA), S-benzyl-cysteine (Bn-Cys NCA), O-benzyl-l-serine (Bn-Ser NCA), and l-phenylalanine (Phe NCA) was performed using N-heterocyclic carbene (NHC) catalysts. The NHC-initiated Ala NCA/Bn-Glu NCA and Ala NCA/Bn-Cys NCA copolymerization reactions achieved 90% conversion within 30 min. The reactivity ratio values estimated using the Kelen and Tüdos method show that poly(Bn-Glu-co-Ala) and poly(Bn-Cys-co-Ala) have random repeating units with rich alternating sequences, whereas poly(Bn-Ser-co-Ala) and poly(Phe-co-Ala) contain a larger proportion of Ala-repeating units than Bn-Ser and Phe in random placement.

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