Diketopiperazine-mediated peptide formation in aqueous solution II. Catalytic effect of phosphate View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1991-05

AUTHORS

O. Takaoka, Y. Yamagata, K. Inomata

ABSTRACT

The previous paper (I) reported that DKP (glycine anhydride) spontaneously reacts with glycine (Gly) or oligoglycines (Glyn) to produce longer oligoglycines (Glyn+2). This paper presents that phosphate catalyzes the condensation reaction quite effectively. Formation of Gly4 from DKP (0.1 M) and Gly2 (0.1 M) in phosphate solution of various concentrations was investigated at a neutral pH at 41 degrees C. The yields of Gly4 increased almost linearly with the concentration of phosphate from 0.06 M to 0.24 M. The yield in 0.24 M phosphate solution was approximately one hundred times as high as that in the absence of the phosphate, whereas in the case of Gly3 formation from DKP and Gly the effect of the phosphate was of ten times lower than in the former case. Orthophosphate was the most effective catalyst among the various kind of chemicals tried in the present investigation including polyphosphates. More... »

PAGES

113-118

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf01809440

DOI

http://dx.doi.org/10.1007/bf01809440

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1021233135

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/1795918


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