Selective emergence and survival of early polypeptides in water
Abstract Oligopeptides essential to primitive cells could not be obtained just by raising the background noise of organic compounds produced by a prebiotic chemistry working at random. Selection pathways were required. Experimental evidence is given for selective condensation of amino acids in water...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1987 |
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| Umfang: |
13 |
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| Reproduktion: |
Springer Online Journal Archives 1860-2002 |
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| Übergeordnetes Werk: |
in: Origins of life and evolution of the biospheres - 1968, 17(1987) vom: März/Apr., Seite 367-379 |
| Übergeordnetes Werk: |
volume:17 ; year:1987 ; month:03/04 ; pages:367-379 ; extent:13 |
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| 520 | |a Abstract Oligopeptides essential to primitive cells could not be obtained just by raising the background noise of organic compounds produced by a prebiotic chemistry working at random. Selection pathways were required. Experimental evidence is given for selective condensation of amino acids in water as well as for selective resistance to degradation. It is shown that N-carboxyanhydrides are good candidates for chemical selection in water. They are formed when active esters of amino acids are left in the presence of bicarbonate ions or when N,N'-carbonyldiimidazole is used as condensing agent. Polymerization of a mixture of proteinaceous and non-proteinaceous amino acids leads to an enrichment in the proteinaceous ones plusα-aminobutyric acid. Selective resistance toward degradation ofβ-pleated sheet conformation is used to exemplify a possible accumulation of homochiral sequences made of hydrophilic and strong hydrophobic residues. Amino acids with branched aliphatic side-chains are selected but those having short linear aliphatic side-chains such asα-aminobutyric acid or norvaline are not. | ||
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(DE-627)NLEJ195393309 DE-627 ger DE-627 rakwb eng Selective emergence and survival of early polypeptides in water 1987 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Oligopeptides essential to primitive cells could not be obtained just by raising the background noise of organic compounds produced by a prebiotic chemistry working at random. Selection pathways were required. Experimental evidence is given for selective condensation of amino acids in water as well as for selective resistance to degradation. It is shown that N-carboxyanhydrides are good candidates for chemical selection in water. They are formed when active esters of amino acids are left in the presence of bicarbonate ions or when N,N'-carbonyldiimidazole is used as condensing agent. Polymerization of a mixture of proteinaceous and non-proteinaceous amino acids leads to an enrichment in the proteinaceous ones plusα-aminobutyric acid. Selective resistance toward degradation ofβ-pleated sheet conformation is used to exemplify a possible accumulation of homochiral sequences made of hydrophilic and strong hydrophobic residues. Amino acids with branched aliphatic side-chains are selected but those having short linear aliphatic side-chains such asα-aminobutyric acid or norvaline are not. Springer Online Journal Archives 1860-2002 Brack, André oth in Origins of life and evolution of the biospheres 1968 17(1987) vom: März/Apr., Seite 367-379 (DE-627)NLEJ188986243 (DE-600)2018578-9 1573-0875 nnns volume:17 year:1987 month:03/04 pages:367-379 extent:13 http://dx.doi.org/10.1007/BF02386475 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 17 1987 3/4 367-379 13 |
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(DE-627)NLEJ195393309 DE-627 ger DE-627 rakwb eng Selective emergence and survival of early polypeptides in water 1987 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Oligopeptides essential to primitive cells could not be obtained just by raising the background noise of organic compounds produced by a prebiotic chemistry working at random. Selection pathways were required. Experimental evidence is given for selective condensation of amino acids in water as well as for selective resistance to degradation. It is shown that N-carboxyanhydrides are good candidates for chemical selection in water. They are formed when active esters of amino acids are left in the presence of bicarbonate ions or when N,N'-carbonyldiimidazole is used as condensing agent. Polymerization of a mixture of proteinaceous and non-proteinaceous amino acids leads to an enrichment in the proteinaceous ones plusα-aminobutyric acid. Selective resistance toward degradation ofβ-pleated sheet conformation is used to exemplify a possible accumulation of homochiral sequences made of hydrophilic and strong hydrophobic residues. Amino acids with branched aliphatic side-chains are selected but those having short linear aliphatic side-chains such asα-aminobutyric acid or norvaline are not. Springer Online Journal Archives 1860-2002 Brack, André oth in Origins of life and evolution of the biospheres 1968 17(1987) vom: März/Apr., Seite 367-379 (DE-627)NLEJ188986243 (DE-600)2018578-9 1573-0875 nnns volume:17 year:1987 month:03/04 pages:367-379 extent:13 http://dx.doi.org/10.1007/BF02386475 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 17 1987 3/4 367-379 13 |
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(DE-627)NLEJ195393309 DE-627 ger DE-627 rakwb eng Selective emergence and survival of early polypeptides in water 1987 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Oligopeptides essential to primitive cells could not be obtained just by raising the background noise of organic compounds produced by a prebiotic chemistry working at random. Selection pathways were required. Experimental evidence is given for selective condensation of amino acids in water as well as for selective resistance to degradation. It is shown that N-carboxyanhydrides are good candidates for chemical selection in water. They are formed when active esters of amino acids are left in the presence of bicarbonate ions or when N,N'-carbonyldiimidazole is used as condensing agent. Polymerization of a mixture of proteinaceous and non-proteinaceous amino acids leads to an enrichment in the proteinaceous ones plusα-aminobutyric acid. Selective resistance toward degradation ofβ-pleated sheet conformation is used to exemplify a possible accumulation of homochiral sequences made of hydrophilic and strong hydrophobic residues. Amino acids with branched aliphatic side-chains are selected but those having short linear aliphatic side-chains such asα-aminobutyric acid or norvaline are not. Springer Online Journal Archives 1860-2002 Brack, André oth in Origins of life and evolution of the biospheres 1968 17(1987) vom: März/Apr., Seite 367-379 (DE-627)NLEJ188986243 (DE-600)2018578-9 1573-0875 nnns volume:17 year:1987 month:03/04 pages:367-379 extent:13 http://dx.doi.org/10.1007/BF02386475 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 17 1987 3/4 367-379 13 |
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(DE-627)NLEJ195393309 DE-627 ger DE-627 rakwb eng Selective emergence and survival of early polypeptides in water 1987 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Oligopeptides essential to primitive cells could not be obtained just by raising the background noise of organic compounds produced by a prebiotic chemistry working at random. Selection pathways were required. Experimental evidence is given for selective condensation of amino acids in water as well as for selective resistance to degradation. It is shown that N-carboxyanhydrides are good candidates for chemical selection in water. They are formed when active esters of amino acids are left in the presence of bicarbonate ions or when N,N'-carbonyldiimidazole is used as condensing agent. Polymerization of a mixture of proteinaceous and non-proteinaceous amino acids leads to an enrichment in the proteinaceous ones plusα-aminobutyric acid. Selective resistance toward degradation ofβ-pleated sheet conformation is used to exemplify a possible accumulation of homochiral sequences made of hydrophilic and strong hydrophobic residues. Amino acids with branched aliphatic side-chains are selected but those having short linear aliphatic side-chains such asα-aminobutyric acid or norvaline are not. Springer Online Journal Archives 1860-2002 Brack, André oth in Origins of life and evolution of the biospheres 1968 17(1987) vom: März/Apr., Seite 367-379 (DE-627)NLEJ188986243 (DE-600)2018578-9 1573-0875 nnns volume:17 year:1987 month:03/04 pages:367-379 extent:13 http://dx.doi.org/10.1007/BF02386475 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 17 1987 3/4 367-379 13 |
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(DE-627)NLEJ195393309 DE-627 ger DE-627 rakwb eng Selective emergence and survival of early polypeptides in water 1987 13 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract Oligopeptides essential to primitive cells could not be obtained just by raising the background noise of organic compounds produced by a prebiotic chemistry working at random. Selection pathways were required. Experimental evidence is given for selective condensation of amino acids in water as well as for selective resistance to degradation. It is shown that N-carboxyanhydrides are good candidates for chemical selection in water. They are formed when active esters of amino acids are left in the presence of bicarbonate ions or when N,N'-carbonyldiimidazole is used as condensing agent. Polymerization of a mixture of proteinaceous and non-proteinaceous amino acids leads to an enrichment in the proteinaceous ones plusα-aminobutyric acid. Selective resistance toward degradation ofβ-pleated sheet conformation is used to exemplify a possible accumulation of homochiral sequences made of hydrophilic and strong hydrophobic residues. Amino acids with branched aliphatic side-chains are selected but those having short linear aliphatic side-chains such asα-aminobutyric acid or norvaline are not. Springer Online Journal Archives 1860-2002 Brack, André oth in Origins of life and evolution of the biospheres 1968 17(1987) vom: März/Apr., Seite 367-379 (DE-627)NLEJ188986243 (DE-600)2018578-9 1573-0875 nnns volume:17 year:1987 month:03/04 pages:367-379 extent:13 http://dx.doi.org/10.1007/BF02386475 GBV_USEFLAG_U ZDB-1-SOJ GBV_NL_ARTICLE AR 17 1987 3/4 367-379 13 |
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Selective emergence and survival of early polypeptides in water |
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Abstract Oligopeptides essential to primitive cells could not be obtained just by raising the background noise of organic compounds produced by a prebiotic chemistry working at random. Selection pathways were required. Experimental evidence is given for selective condensation of amino acids in water as well as for selective resistance to degradation. It is shown that N-carboxyanhydrides are good candidates for chemical selection in water. They are formed when active esters of amino acids are left in the presence of bicarbonate ions or when N,N'-carbonyldiimidazole is used as condensing agent. Polymerization of a mixture of proteinaceous and non-proteinaceous amino acids leads to an enrichment in the proteinaceous ones plusα-aminobutyric acid. Selective resistance toward degradation ofβ-pleated sheet conformation is used to exemplify a possible accumulation of homochiral sequences made of hydrophilic and strong hydrophobic residues. Amino acids with branched aliphatic side-chains are selected but those having short linear aliphatic side-chains such asα-aminobutyric acid or norvaline are not. |
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Abstract Oligopeptides essential to primitive cells could not be obtained just by raising the background noise of organic compounds produced by a prebiotic chemistry working at random. Selection pathways were required. Experimental evidence is given for selective condensation of amino acids in water as well as for selective resistance to degradation. It is shown that N-carboxyanhydrides are good candidates for chemical selection in water. They are formed when active esters of amino acids are left in the presence of bicarbonate ions or when N,N'-carbonyldiimidazole is used as condensing agent. Polymerization of a mixture of proteinaceous and non-proteinaceous amino acids leads to an enrichment in the proteinaceous ones plusα-aminobutyric acid. Selective resistance toward degradation ofβ-pleated sheet conformation is used to exemplify a possible accumulation of homochiral sequences made of hydrophilic and strong hydrophobic residues. Amino acids with branched aliphatic side-chains are selected but those having short linear aliphatic side-chains such asα-aminobutyric acid or norvaline are not. |
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Abstract Oligopeptides essential to primitive cells could not be obtained just by raising the background noise of organic compounds produced by a prebiotic chemistry working at random. Selection pathways were required. Experimental evidence is given for selective condensation of amino acids in water as well as for selective resistance to degradation. It is shown that N-carboxyanhydrides are good candidates for chemical selection in water. They are formed when active esters of amino acids are left in the presence of bicarbonate ions or when N,N'-carbonyldiimidazole is used as condensing agent. Polymerization of a mixture of proteinaceous and non-proteinaceous amino acids leads to an enrichment in the proteinaceous ones plusα-aminobutyric acid. Selective resistance toward degradation ofβ-pleated sheet conformation is used to exemplify a possible accumulation of homochiral sequences made of hydrophilic and strong hydrophobic residues. Amino acids with branched aliphatic side-chains are selected but those having short linear aliphatic side-chains such asα-aminobutyric acid or norvaline are not. |
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