摘要:
This invention is to provide a compound for antagonizing CCR5, said compound being represented by the formula: wherein R1 is an optionally substituted phenyl or an optionally substituted thienyl; Y is —CH2—, —S— or —O—; and R2, R3 and R4 are independently an optionally substituted aliphatic hydrocarbon group or an optionally substituted alicyclic heterocyclic ring group, and being effective for the prevention and treatment of infectious disease of HIV.
摘要:
This invention is to provide a compound for antagonizing CCR5, said compound being represented by the formula: ##STR1## wherein R.sup.1 is an optionally substituted phenyl or an optionally substituted thienyl; Y is --CH.sub.2 --, --S-- or --O--; and R.sup.2, R.sup.3 and R.sup.4 are independently an optionally substituted aliphatic hydrocarbon group or an optionally substituted alicyclic heterocyclic ring group, and being effective for the prevention and treatment of infectious disease of HIV.
摘要:
A cysteine-free peptide is produced by producing a fused protein comprising a protein having cysteine at its N-terminal and a cysteine-free peptide ligated to the N-terminal and subsequently subjecting the fused protein to a reaction for cleaving the peptide linkage.
摘要:
A guanidino group in an amino acid or a peptide can be protected with a specific group, i.e. pentamethylbenzensulfonyl, 2,4,6-trimethoxybenzenesulfonyl, 4-methoxy-2,3,5,6-tetramethylbenzenesulfonyl, 4-methoxy-2,6-dimethylbenzenesulfonyl or 4-methoxy-2,3,6-trimethylbenzenesulfonyl, and said group may easily be removed without affecting the amino acid or the peptide to be derived from the protected amino acid or peptide. Thus, the present invention is useful in the synthesis of peptides containing the guanidino group.
摘要:
Novel nonapeptides of the formula:pGlu-X-Lys-Ser-Gln-Y-Z-Ser-Asn-OHwherein X is Ala or (D)-Ala; Y and Z are the same or different and each is the residue of a D-amino acid containing 3 to 9 carbon atoms, or Gly; and at least one of X, Y and Z is the residue of D-amino acid, have immunoregulator activity and are of value as medicines.
摘要:
A novel peptide of the formula: ##STR1## wherein A is hydrogen, alkyl, aralkyl, alkoxyalkyl, hydroxyalkyl or alkoxy; R is ##STR2## X is --S-- or --(CH.sub.2).sub.n -- where n is 1 or 2 has a weaker TRH releasing activity than TRH and a stronger anaesthesia-antagonistic activity, spontaneous movement-stimulant activity or dopamine-potentiating activity than TRH.
摘要:
According to the present invention, a matrix reagent prepared by adding methylenediphosphonic acid (MDPNA) having two phosphonic acid groups as an additive to a matrix of 2,5-dihydroxybenzoic acid (DHBA) is used for the preparation of a sample. By using the sample according to the present invention, it is possible to achieve a higher peak intensity of phosphopeptide as compared with a sample in which DHBA is solely used as a matrix without using an additive, or a sample in which phosphoric acid (PA) is used as an additive in addition to DHBA. Further, use of the sample according to the present invention enables the detection of peptides that cannot be detected in a case of the phosphoric acid-added sample.
摘要:
According to the present invention, a matrix reagent prepared by adding methylenediphosphonic acid (MDPNA) having two phosphonic acid groups as an additive to a matrix of 2,5-dihydroxybenzoic acid (DHBA) is used for the preparation of a sample. By using the sample according to the present invention, it is possible to achieve a higher peak intensity of phosphopeptide as compared with a sample in which DHBA is solely used as a matrix without using an additive, or a sample in which phosphoric acid (PA) is used as an additive in addition to DHBA. Further, use of the sample according to the present invention enables the detection of peptides that cannot be detected in a case of the phosphoric acid-added sample.
摘要:
The present invention provides a method which is capable of mainly detecting the objective substance by mass spectrometry and can also be applied effectively to a sample to be measured without conducting enrichment process. A mass spectrometric method comprising: in a mass spectrometry specifically ionizing a specific substance to be measured contained in a mixture sample containing the specific substance and a substance other than the specific substance by using a matrix that is more likely to ionize the specific substance than the substance other than the specific substance, to selectively measure the specific substance from the mixture. Preferably, the specific substance is a peptide modified with 2-nitrobenzenesulfenyl chloride, and the matrix is a nitrobenzene derivative such as hydroxynitrobenzoic acid. The matrix is preferably used in combination with α-cyano-4-hydroxycinnamic acid.
摘要:
The present invention provides a method capable of efficiently ionizing hydrophobic peptides in MALDI-IT, MALDI-IT-TOF, and MALDI-FTICR mass spectrometers. A method of measuring a peptide with a mass spectrometer having a MALDI (Matrix Assisted Laser Desorption/Ionization) ion source, using α-cyano-3-hydroxycinnamic acid or 3-hydroxy-4-nitrobenzoic acid as a matrix. Preferably, a peptide derivatized with 2-nitrobenzenesulfenyl chloride is measured with a MALDI-IT, MALDI-IT-TOF, or MALDI-FTICR mass spectrometer. When 3-hydroxy-4-nitrobenzoic acid is used as a matrix, the matrix is preferably used as a mixed matrix in which α-cyano-4-hydroxycinnamic acid is combined.