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'Proline' in keywords
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1Author    B. Rigitte, S. ChobertRequires cookie*
 Title    A Near-Infrared Spectroscopic Investigation of Water in Solutions with Proline, Glycinebetaine, Glycerol and Albumin  
 Abstract    The (v2 + v3) com bination band o f water has been investigated in aqueous solutions o f proline, glycinebetaine and glycerol and in a three component solution with each o f these substances and albumin. It is shown that the hydrogen bonding strength between the water protons and proline or betaine is higher than between water and glycerol. Betaine exhibits a higher affinity versus the oxygen o f water than does proline. The water binding capacity o f pure proline solutions is unchanged in a three-com ponent solu­ tion with albumin. Proline neither enhances nor reduces the solubility o f this highly soluble pro­ tein. In contrast, in a three-com ponent solution with betaine, the solubility o f both betaine and al­ bum in is reduced. It is assumed that these solute particles com pete for the sam e binding position on the water m olecule. Concentrated glycerol solutions with very low water concentrations dissolve a considerable am ount o f albumin, which points to the fact that the protein must be partly dis­ solved in glycerol itself. 
  Reference    Z. Naturforsch. 34c, 699—703 (1979); received February 2/M ay 29 1979 
  Published    1979 
  Keywords    Water, Protein, Proline, Betaine, Glycerol 
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 TEI-XML for    default:Reihe_C/34/ZNC-1979-34c-0699.pdf 
 Identifier    ZNC-1979-34c-0699 
 Volume    34 
2Author    J. Iř, Ina Kopoldová, M. Ilan, V. Oráček-HübschRequires cookie*
 Title    Gamma-Radiolysis of Aqueous Solution of Proline  
 Abstract    Gamma-radiolysis of 0.05 M aqueous neutral proline solution was investigated. As the main reaction of proline radiolysis in oxygenated solutions, the hydroxylation reactions leading to hydroxyproline formation and the reactions leading to the total destruction of the pyrrolidine ring were shown. In oxygen-free solutions the yield of these reactions decreased; in this medium combination reactions giving rise to higher molecular weight combination products (up to approx. 1500) belong to the most important ones. In addition to radiation-decarboxylation reactions the products of radiation-carboxylation reactions were also detected in the irradiated solution of proline free of oxygen. 
  Reference    (Z. Naturforsch. 30c, 474—477 [1975]; received November 1 5 1974/February 261975) 
  Published    1975 
  Keywords    Gamma-Radiolysis, Aqueous Solution, Proline, Radiation 
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 TEI-XML for    default:Reihe_C/30/ZNC-1975-30c-0474.pdf 
 Identifier    ZNC-1975-30c-0474 
 Volume    30 
3Author    É. Va, Patricia Murakeözy, Zoltán Nagy, Zoltán TubaRequires cookie*
 Title    Proline Accumulation Pattern in Species of an Inland Salme Habitat  
 Abstract    Seasonal and diurnal fluctuations were measured in the leaf proline content of three dicot species (Lim onium gmelini, Lepidium crassifolium and Camphorosma annua), natives to an inland saline area of Hungary. Proline contents were negatively correlated to the mean monthly tem perature in all three species. All the investigated species accumulated proline in February and/or M arch, while increases in temperature were followed by a drop in proline level by the beginning of April/May. Sodium accumulation in the leaves as well as soil water content influenced the amount of proline to a smaller extent than temperature in all of the investigated species. Accumulation of proline did not show significant correlations with the accumulation of sodium in the leaves. Diurnal pattern of leaf proline content changed during the growing season with a decreasing trend at the beginning (April) and increasing trend at the end (August) of the season. 
  Reference    Z. Naturforsch. 54c, 718 (1999); received December 3 1998/March 16 1999 
  Published    1999 
  Keywords    Proline, Sodium Accum ulation, Cold Stress, Salinity Stress 
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 TEI-XML for    default:Reihe_C/54/ZNC-1999-54c-0718.pdf 
 Identifier    ZNC-1999-54c-0718 
 Volume    54 
4Author    Paxton Loke, Tiow-Suan SimRequires cookie*
 Title    Site-Directed Mutagenesis of Proline-285 to Leucine in Cephalosporium acremonium Isopenicillin N -Synthase Affects Catalysis and Increases Soluble Expression at Higher Temperatures  
 Abstract    The conversion of Ö-(L-a-aminoadipyl)-L-cysteinyl-D-valine (A C V) to isopenicillin N is de­ pendant on the catalytic action of isopenicillin N -synthase (IPNS), an important enzyme in the penicillin and cephalosporin biosynthetic pathway. One of the amino acid residues suggested by the Aspergillus nidulans IPNS crystal structure for interaction with the valine isopropyl group of ACV is proline-283. Site-directed mutagenesis of the corresponding pro­ line-285 to leucine in Cephalosporium acremonium IPNS resulted in non-measurable activity but an increased soluble expression at higher temperatures in a heterologous E. coli host. 
  Reference    Z. Naturforsch. 56c, 413 (2001); received January ll/F ebruary 14 2001 
  Published    2001 
  Keywords    Isopenicillin N -Synthase, Site-Directed Mutagenesis, Proline 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0413.pdf 
 Identifier    ZNC-2001-56c-0413 
 Volume    56