Zobrazeno 1 - 10 of 57 pro vyhledávání: '"Gian Paolo Lorenzi"'
1
Conformational characteristics of alternating stereo-co-oligopeptides of D- and L-norleucine: influence of an N-methyl group
Autor: Emma Fenude Schoch, Daniel Urs Römer, Gian Paolo Lorenzi
Publikováno v: International Journal of Peptide and Protein Research. 44:10-18
The conformational behavior of members of the series Boc-(L-Nle)m-(D-Nle-L-Nle)(n-m)/2-OMe (m = 0 or 1; n = total number of residues) with n < or = to 12, and of analogs of comparable chain length having a NMe-group on the (n - 3)th residue has been
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71e0e5ce95e0545c0a30a52e6b969374
https://doi.org/10.1111/j.1399-3011.1994.tb00398.x
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3
On the Stacking of ? -Rings: The solution self-association behavior of two partiallyN-methylated cyclo(hexaleucines)
Autor: Gian Paolo Lorenzi, Xicheng Sun
Publikováno v: Helvetica Chimica Acta. 77:1520-1526
Cyclo(-D-Leu-L-MeLeu-D-Leu-L-MeLeu-D-Leu-L-MeLeu-) (1) and cyclo(-L-Leu-D-Leu-L-MeLeu-D-Leu-L-Leu-D-Leu-) (2) were synthesized and used for a study of the interaction of β -rings in solution. In appropriate solvents, 1 and 2 formed dimers consisting
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b1a9b8e4ab43ab41723a4bb22f4ab889
https://doi.org/10.1002/hlca.19940770607
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4
Nanothin films of tubular oligopeptides: monolayers and Langmuir-Blodgett films of β4.4-helices with surface-pressure-dependent orientation
Autor: Albrecht L. Weisenhorn, Gian Paolo Lorenzi, Daniel Urs Römer
Publikováno v: Thin Solid Films. 238:285-289
The orientation of β 4.4 helices of a D, L -alternating pentadecavaline, Boc- D -Val-( L -Val- D -Val) 7 -OMe, in monolayers at the air-water interface and in Langmuir-Blodgett films has been investigated. Compression of these helices in a Langmuir
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d0fd52d47f81a3fbf124b0ac0bfbdc1e
https://doi.org/10.1016/0040-6090(94)90068-x
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5
A structural two-ring version of a tubular stack of?-rings in crystals of a cyclic D,L-hexapeptide
Autor: Xicheng Sun, Benedetto Di Blasio, Angela Lombardi, Laura Zaccaro, Gian Paolo Lorenzi, Carlo Pedone, Michele Saviano
Publikováno v: Journal of Inclusion Phenomena and Molecular Recognition in Chemistry. 18:27-36
An X-ray analysis of single crystals (from MeOH) of cyclo(-D-Leu-L-MeLeu-D-Leu-L-MeLeu-D-Leu-L-MeLeu-) has been carried out. The analysis reveals that the molecules of the cyclopeptide occur in the crystals with two slightly different, almost hexagon
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::860299c401fcadbae3b4fbe76d43b8ee
https://doi.org/10.1007/bf00706936
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6
On Intrahelical Hydrogen Bonding and Stability of β-Helices: The behavior of someD,L-alternating oligoleucines with anN-methylated residue
Autor: Emma Fenude-Schoch, Gian Paolo Lorenzi, Daniel Urs Römer, Heinz Rüegger
Publikováno v: Helvetica Chimica Acta. 76:451-458
An N methylated residue at the n – 3 position of the chain was used to reduce the maximum number of H-bonds realizable y some D,L-alternating oligopeptides in β4.4-, 5.6- and 5.6-helices and thus increase for the oligopeptides, the relative stabil
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f7b5358bd3c43311bcaca8144aabaf3d
https://doi.org/10.1002/hlca.19930760129
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7
Structural isomerism in polycondensates. 5. Configurational characteristics of the amide groups in some N-methylated polyamides of different isomeric structure
Autor: Piero Pino, Gecheng Xie, Gian Paolo Lorenzi
Publikováno v: Macromolecules. 23:2583-2588
Des polyamides constitues des motifs (-ab-) methylimino (1,4-phenylene) ethylenemethylimino et (-cc-) carbonyl tetranethylenecarbonyl avec une structure tete a tete, tete a tete (queue a queue) ou aleatoire et des diamides modeles contenant la sequen
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dfa2d194dbbdca951782f6036f3f79c0
https://doi.org/10.1021/ma00211a029
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8
N-Methylated oligo(p-phenyleneterephthalamides) with high propensity for intramolecular cyclization
Autor: U. W. Suter, L. Tomasic, Gian Paolo Lorenzi
Publikováno v: Macromolecules. 26:1183-1185
It has been shown previously that N-alkylation of poly(p-phenyleneterephtalamide) causes the loss of the ability to form liquid crystalline solutions. This effect has been attributed to a plausible strong prederence of the N-sunstituted amide groups
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d9c5d78a894619cc89ac088f9e6eac80
https://doi.org/10.1021/ma00057a045
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9
An alternative to Urry's model for the gramicidin transmembrane channels
Autor: Gian Paolo Lorenzi
Publikováno v: Chirality. 3:315-317
It is suggested that the conducting transmembrane channels formed by the linear gramicidins A, B and C may be head-to-head (formyl end-to-formyl end) dimers of double-stranded parallel β-helices. This possibility is not in conflict with any of the v
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bbbd761f2bc78ac76f173a76f08f8644
https://doi.org/10.1002/chir.530030416
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