New PDF release: Amino-Acid Homopolymers Occurring in Nature

By Munenori Takehara, Hideo Hirohara (auth.), Yoshimitsu Hamano (eds.)

ISBN-10: 3642124526

ISBN-13: 9783642124525

Microorganisms are able to generating a large choice of biopolymers. Homopolymer peptides, that are made of just a unmarried form of amino acid, are some distance much less ubiquitous. the one amino-acid homopolymers identified to happen in nature are offered during this quantity. Poly-epsilon-L-lysine is a polycationic peptide and shows antimicrobial task opposed to a large spectrum of microorganisms. it's either secure and biodegradable and is for that reason used as a foodstuff preservative in numerous nations. furthermore, there was nice curiosity in scientific and different purposes of poly-lysine and its derivatives. by contrast, poly-gamma-glutamic acid is an strange anionic polypeptide. it's also water soluble, biodegradable, safe to eat, non-toxic and non-immunogenic and will be chemically transformed to introduce numerous medications. those positive factors are very worthwhile for pharmaceutical and biomedical purposes. Poly-glutamic acid can also be a hugely beautiful as nutrition ingredient.

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Extra resources for Amino-Acid Homopolymers Occurring in Nature

Sample text

Albulus remains unclear. However, e-PL exhibits antimicrobial activity with a wide spectrum of microorganisms including Gram-positive and Gram-negative bacteria (Shima et al. 1984; Hiraki 2000), and is applied under practical circumstances as a food additive on the basis of its strong antimicrobial activity (Shima et al. 1984; Hiraki 2000); the minimum inhibitory concentration (MIC) of e-PL for the growth of many bacteria is indicated as below 100 mg mlÀ1 (Shima et al. 1984; Hiraki 2000). Although MICs for fungi are high, the inhibitory effect of e-PL is superior to that of other antimicrobial compounds used as food preservatives.

46 Assay for e-PL-Degrading Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 e-PL Degradation by Microorganisms . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 e-PL Degradation by e-PL-Tolerant Microorganisms . . . . . . . . . . . . . . . . . 2 e-PL Degradation by e-PL-Producing Microorganisms . . . . . . . . . . . . . . . . 52 4 Molecular Genetic Analysis of e-PL-Degrading Enzyme of S.

46 Assay for e-PL-Degrading Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 e-PL Degradation by Microorganisms . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 e-PL Degradation by e-PL-Tolerant Microorganisms . . . . . . . . . . . . . . . . . 2 e-PL Degradation by e-PL-Producing Microorganisms . . . . . . . . . . . . . . . . 52 4 Molecular Genetic Analysis of e-PL-Degrading Enzyme of S.

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Amino-Acid Homopolymers Occurring in Nature by Munenori Takehara, Hideo Hirohara (auth.), Yoshimitsu Hamano (eds.)


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