L-Cystine CAS: 56-89-3 99% Makristasi machena kana crystalline poda
| Catalog Number | XD90322 |
| Product Name | L-cystine |
| CAS | 56-89-3 |
| Molecular Formula | C6H12N2O4S2 |
| Molecular Weight | 240.30 |
| Storage Details | Ambient |
| Harmonised Tariff Code | 29309013 |
Chigadzirwa Specification
| Chitarisiko | Makristasi machena kana crystalline poda |
| Assay | 99% |
| Giredhi | USP32 |
| Kutenderera chaiko | -215° kusvika -225° |
| Heavy metals | <0.0015% |
| AS | 1.5ppm max |
| SO4 | 0.040%max |
| Fe | <0.003% |
| Kurasika paKuomesa | 0.20% max |
| Residual paIgnition | 0.10% max |
| Cl | 0.10% max |
Zvimiro zvekristaro zve carboxypeptidase T (CpT) zvine phenylalanine uye arginine substrate analogs - benzylsuccinic acid uye (2-guanidinoethylmercapto) succinic acid - zvakatemwa nemaitiro ekutsiva mamorekuru pazvisarudzo zve 1.57 Å uye 1.62 yakafara profiyuta Å kuti ijekese chimiro chaicho Å ye enzyme.Iyo inochengetedza Leu211 uye Leu254 zvisaririra (zvakare zviripo mune zvese zviri zviviri carboxypeptidase A uye carboxypeptidase B) zvakaratidzwa kuva zvimiro zvinogadzirisa kucherechedzwa kwehydrophobic substrates, nepo Asp263 yaive yekucherechedzwa kweiyo yakanaka charged substrates.Shanduko dzezvigadziriso izvi zvinoshandura iyo substrate mbiri: iyo CpT mutsauko Leu211Gln inowana carboxypeptidase B-yakafanana zvivakwa, uye CpT mutsauko Asp263Asn iyo carboxypeptidase A-yakafanana kusarudza.Iyo Pro248-Asp258 loop inodyidzana neLeu254 uye Tyr255 yakaratidzwa kuve ine basa rekucherechedzwa kweiyo substrate's C-terminal yakasara.Substrate inosunga paS1 'subsite inotungamira kune ligand-dep endent shanduko yeiyi loop, uye Leu254 side chain movement inokonzeresa kurongekazve kweiyo Glu277 yakasara yakakosha pakugadzirisa.Iyi inyowani muono we substrate selectivity ye metallocarboxypeptidases inoratidza kukosha kwekudyidzana pakati peS1' subsite uye catalytic centre.
