نتایج جستجو برای: pth amino acids
تعداد نتایج: 346374 فیلتر نتایج به سال:
two dimensional thin layer chromatography on polyamide sheets is a useful method for identification of pth-amino acids which have very close rf-values. the solvent systems described here are particularly effective and have an edge over other solvent systems used for the separation of pth-amino acids. the solvent systems provide a clear separation of all pth-amono acids except lle / leu in a rel...
Two dimensional thin layer chromatography on polyamide sheets is a useful method for identification of PTH-amino acids which have very close Rf-values. The solvent systems described here are particularly effective and have an edge over other solvent systems used for the separation of PTH-amino acids. The solvent systems provide a clear separation of all PTH-amono acids except lle / Leu in a...
An electrospray ionization (ESI) ambient pressure ion-mobility spectrometer (APIMS) interfaced to an orthogonal reflector time-of-flight mass spectrometer (TOFMS) was evaluated for the first time as a detector for the identification of phenylthiohydantoin (PTH)-derivatized amino acids, the final products in the Edman sequencing process of peptides and proteins. The drift and flight times of the...
Parathyroid hormone (PTH) plays a vital role in regulating of blood Calcium. In addition, it regulates the amount of phosphate and vitamin D in the blood. PTH is a polypeptide hormone that found in the blood circulation as peptides with different amino acid counts. The active form of the PTH which has biological activity, contains 84 amino acids, but under the influence of proteolytic enzymes...
Capillary zone electrophoresis provides a rapid method for the analysis of minute amounts of amino acids. A laser-based absorbance technique is used to determine phenylthiohydantoin amino acids with detection limits of 10.15 mot; separation of 20 amino acids, based on micelle modified zone electrophoresis, requires 13 minutes. The amino acid sequence of a protein is of fundamental value in the ...
abstract amino acids are building blocks of proteins, and play a vital role in living beings existence and their functionality. the interaction of these compounds with metal ions is of great importance to biochemists, and chemists, because their functions can be utilized as a model in understanding enzymes mechanism for transport of metal ions to tissues. among twenty essential amino acids w...
The formation of parathyroid hormone (PTH) in the parathyroid gland occurs via two successive proteolytic cleavages from larger biosynthetic precursors. The initial product coded for by PTH mRNA is pre-proparathyroid hormone (PreProPTH), a polypeptide of 115 amino acids. Within 1 min of synthesis, the polypeptide, proparathyroid hormone (ProPTH), is formed as a result of the proteolytic removal...
background: parathyroid hormone (pth) secreted by parathyroid glands regulates the metabolism of calcium and phosphorus in bone and kidney. thereby, it can stimulate bone formation, and is a promising agent in the treatment of osteoporosis. mature form of pth consists of 84 amino acids; however, the first 34 residues of pth cover the majority of hormonal action. methods: in this study, the fusi...
Attempts to apply the technique of Edman (l), for the stepwise degradation of peptides with the formation of phenylthiohydantoins (PTH), to the study of the N-terminal amino acid sequence of pepsin have resulted in only qualified success. One of the principal drawbacks of this technique arises from the fact that the reactions entailed are usually not complete. Thus, residual amounts of terminal...
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