L-Cystine CAS: 56-89-3 99% cristallum album vel crystallinum pulverem
| Catalogue Number | XD90322 |
| Product Name | L-Cystine |
| CAS | 56-89-3 |
| Formulae hypotheticae | C6H12N2O4S2 |
| M. Pondus | 240.30 |
| Repono Details | Ambiens |
| Tariff Code harmonized | 29309013 |
Product Specification
| Aspectus | Album crystallinam vel crystallinum pulveris |
| Assay | 99% |
| Gradus | USP32 |
| Imprimis rotationis | -215° to -225° |
| Metalla gravis | <0.0015% |
| AS | 1.5ppm max |
| SO4 | 0.041%max |
| Fe | <0.003% |
| Damnum in Siccatio | 0.20%max |
| RELICTUM in Ignition | 0.10%max |
| Cl | 0.10%max |
De crystallis structurae carboxypeptidase T (CpT) complexorum cum phenylalaninis et arginine substrata analogs - acidum benzylsuccinicum et (acidi 2-guanidinoethylmercapto) succinicum - methodo substituendi hypothetica determinata in resolutionibus 1,57 Å et 1,62Å ad declarandum latum substratum speciei profile de enzyme.Conservativa Leu211 et Leu254 residua (etiam in utroque carboxypeptidase A et carboxypeptidase B) ostensa sunt structurae determinantes pro recognitione substratorum hydrophobicorum, cum Asp263 erat agnitio substratorum positivorum accusatorum.Mutationes horum determinantium substratae profile modificant: variantes CpT Leu211Gln acquirit carboxypeptidasum B-similis possessiones, et CpT variantes Asp263Asn carboxypeptidasum A-similis selectivity.Ansam Pro248-Asp258 mutuo cum Leu254 et Tyr255 mutuantibus ostensa est responsales esse recognitionis reliquiarum C-terminalis substratis.Substratum ligamen ad subsitum S1 ducit ad transpositionem ligandi-dep endent huius ansae, et Leu254 motus lateralis catenae conformationem inducit conversionem Glu277 crucialis residuae pro catalysi.Haec nova perceptio substrata est selectivity metallocarboxypeptidases quae momentum demonstrat interactionum inter substratum S1 et centrum catalytici.
