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'Peptides' in keywords Facet   section ZfN Section B  [X]
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1Author    W.Requires cookie*
 Title    Circulardichroismusuntersuchungen des Thyreotropin-Releasinghormons (TRH) Circular Dichroism Investigations of TRH  
 Abstract    o l f g a n g V o e l t e r , K a r l Z e c h , P e t e r G ö b e l , O s k a r O s t e r u n d A n t o n io A t t a n a s io Im Zusammenhang mit Untersuchungen zur Struktur13 und Wirkungsweise4 der kürzlich aufge­ klärten5-6 Hypothalamus-Releasinghormone haben wir Circulardichroismus(CD)-Spektren des Thyreo­ tropin-Releasinghormons (TRH) vermessen, da mit der Methode des CD konformative und konfi­ gurative Änderungen optisch aktiver Moleküle nachweisbar sind. TRH wird durch Kuppeln der Aminosäurederi­ vate Benzyloxycarbonyl-(4.4'-dimethoxybenzhy-dryl)-L-glutamin, L-Histidin-methylester und l -Prolinamid mit N.N'-Dicyclohexylcarbodiimid dar­ gestellt3. Die Primärstruktur von TRH ist Pyr-His-Pro-NH2. 
  Reference    (Z. Naturforsch. 30b, 142—143 [1975]; eingegangen am 15. September 1973) 
  Published    1975 
  Keywords    Circular Dichroism, Releasing Hormones, Peptides 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0142_n.pdf 
 Identifier    ZNB-1975-30b-0142_n 
 Volume    30 
2Author    Kosaku Nöda, Erhard GrossRequires cookie*
 Title    Solid-Phase Synthesis of Peptides via a,ß-Unsaturated Amino Acids. Incorporation of the Amide Gronp in encZo-Positions  
 Abstract    Dehydroalanine is introduced as pseudo-protecting group for the to-amide function of Asn and Gin in solid-phase peptide synthesis. Using Boc-X(Dha-NHMe)-OH (X = Asp or Glu), the model peptides, L-Leu-L-Asn-Gly-NH2 and L-Leu-Lr-Gln-Gly-NH2, were synthesized. 
  Reference    Z. Naturforsch. 36b, 1345—1347 (1981); received July 15 1981 
  Published    1981 
  Keywords    Amide Group, Dehydroalanine, Peptide, Solid-Phase Synthesis 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1345.pdf 
 Identifier    ZNB-1981-36b-1345 
 Volume    36 
3Author    Karl Folkers, CyrilY. Bowers+, WilsonB. Lutz, Klaus Friebel, Teresa Kubiak, Bernhard Schircks, Georg RampoldRequires cookie*
 Title    Synthesis and Bioassay of Antagonists of the Luteinizing Hormone Releasing Hormone Having the Azagly 10 Moiety  
 Abstract    Seven new analogs of the luteinizing hormone releasing hormone (LHRH), having an Azagly 10 moiety, and three corresponding Gly 10 -analogs were synthesized for bioassay and comparison of inhibitory potencies. This study was toward a possible advantage of the Azagly 10 moiety to minimize C-terminal degradation, in vivo. Of the three procedures which were studied to achieve Azagly 10 -peptides, the reaction of cyanate ion with hydrazides was the most favorable. Variations of substitution in position 1 were also studied. The data from the antiovulatory assay showed that an Azagly 10 moiety may not depress activity, and may allow equal or even higher activity than the Glv 10 moiety, depending on the analog. [N-Ac-D-Thr 1 , D-p-Cl-Phe 2 , D-Trp 3 -6 , Azagly 10 ] LHRH was more inhibitory than the corresponding Gly 10 -analog. Based on pairs of analogs, the following relationships appeared: (1) N-Ac-D-Thr 1 was more effective than N-Ac-jo-Cl-Phe 1 ; (2) The L-configuration of Ala as N-Ac-Ala 1 -was more effective than the D—; (3) N-Ac-Ala 1 appeared more effective than the N-Ac-D-Thr 1 ; (4) D-Trp 6 appeared more effective than D-Phe 6 . In an ultimate clinical use of an antagonist of LHRH to block ovulation, the Azagly 10 moiety may be advantageous for limitation of enzymatic degradation. 
  Reference    Z. Naturforsch. 37b, 1075—1081 (1982); received March 23 1982 
  Published    1982 
  Keywords    Antagonist, Luteinizing Hormone Releasing Hormone, Ovulation, Peptides, Azaglycine 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1075.pdf 
 Identifier    ZNB-1982-37b-1075 
 Volume    37 
4Author    A. Marston, E. HeckerRequires cookie*
 Title    Structure-Activity Relationships of Polyfunctional Diterpenes of the Tigliane Type, V* Preparation and Irritant Activities of Amino Acid and Peptide Esters of Phorbol  
 Abstract    The synthesis of a series of 12-O-amino acyl-and 12-0-peptidyl-13-acetate and -13,20-diacetate esters of the tetracyclic diterpene alcohol phorbol is described. These esters, which include amino acid moieties with both N-protected and free amino functions, were all tested for irritant activity on mouse ear. The highest activities were observed for esters with N-9-fluorenylmethyloxycarbonyl-protected leucine and 11-aminoundecanoic acid. 
  Reference    Z. Naturforsch. 38b, 1015—1021 (1983); received March 28 1983 
  Published    1983 
  Keywords    Amino Acids, Peptides, Phorbol Esters, Irritants, Tumour Promoters 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-1015.pdf 
 Identifier    ZNB-1983-38b-1015 
 Volume    38 
5Author    Karl Folkers, CyrilY. Bowers, Yin-Zeng Liu, Xiao Shao-Bo, Hong-Ming Shieh, Chu Ji-YuRequires cookie*
 Title    Antagonists of the Luteinizing Hormone Releasing Hormone with Emphasis on Amino Acids in Position Five  
 Abstract    Seventeen analogs of the luteinizing hormone releasing hormone (LHRH) have been syn-thesized, bioassayed, and compared for antiovulatory activity (AOA) in rats. The emphasis of design was replacement of Tyr 5 of LHRH. Position 5 has not been extensively studied. [N—Ac—D-2-Nal 1 , D-pClPhe 2 , D-3-Pal 3 , D-Arg 6 , D—Ala 10 ]-LHRH was the baseline for new designs. Comparison of the AOA's of the 17 analogs with the baseline revealed the two peptides with Phe 5 and 3-Pal 5 had equivalent AOA's, and were the best of the 17, and about 45% more potent than the baseline. Analogs with pClPhe 5 , oClPhe 5 , a-MepClPhe 5 , 2-Nal 5 , Trp 5 , and His 5 were less potent than the Phe 5 -and 3-Pal 5 -analogs. Based on the Phe 5 -analog, eight other analogs were synthesized with changes in positions 1, 2, 3 and 7 and although none were better than the baseline, 5/8 showed 20—60% AOA's at 250 ng and revealed optimum positions for new designs. 
  Reference    Z. Naturforsch. 40b, 313—316 (1985); received August 20 1984 
  Published    1985 
  Keywords    Peptide, Hormone, Ovulation, Luteinizing Hormone Releasing Hormone, Antagonist 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0313.pdf 
 Identifier    ZNB-1985-40b-0313 
 Volume    40 
6Author    Karl Folkers, Cyril Bowers, Xiao Shao-Bo, Pui-Fun, Louisa Tang, Minoru Kubota, Janusz Stepinski, Teresa KubiakRequires cookie*
 Title    Activities of Antagonists of the Luteinizing Hormone Releasing Hormone with Emphasis on Positions 1, 5 and 6 and on Positions 1, 2 and 3  
 Abstract    Analogs of the luteinizing hormone releasing hormone (LHRH) which are antagonists for controlling ovulation require potency and negligible release of histamine as a side effect. Forty analogs were designed, synthesized and bioassayed in two groups with emphasis upon positions 1, 5 and 6 and upon positions 1, 2 and 3. N-Ac-D-2-Nal 1 , D-pClPhe 2 , D-3-Pal 3 , Ser 4 , Tyr 5 . D-Lys 6 , 
  Reference    (Z. Naturforsch. 42b, 101—106 [1987]; received July 18 1986) 
  Published    1987 
  Keywords    Luteinizing Hormone Releasing Hormone, a«f/-Ovulatory Activity, Peptide, Antagonist, Histamine Release 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0101.pdf 
 Identifier    ZNB-1987-42b-0101 
 Volume    42