L-Cysteine CAS:52-90-4 98-101%
| Catalogue Number | XD90321 |
| Product Name | L-Cysteine |
| CAS | 52-90-4 |
| Formulae hypotheticae | HSCH2CH(NH2)CO2H |
| M. Pondus | 121.16 |
| Repono Details | 2 ad 8 °C |
| Tariff Code harmonized | 29309013 |
Product Specification
| Aspectus | Album pulveris crystallini |
| Assay | 98.0% - 101.0% |
| Imprimis rotationis | +8.3°~ +9.5° |
| pH | 4.5 ~ 5.5 |
| SO4 | 0.03% max |
| Fe | 10ppm max |
| Damnum in Siccatio | 0.5% max |
| Residere in Ignition | 0.1% max |
| NH4 | 0.02% max |
| AS2O3 | 1ppm max |
| Cl | ≤0.2% |
| Metalla gravia (ut Pb) | 10ppm max |
| State of SOLUTIO | 95.0% min |
Botri ferrei sulphuris pro cofactoribus amplis servo, cum diversis muneribus hypotheticis in cellulis tam prokaryoticis et eukaryoticis.Machinariae dedicatae racemos congregant easque in moleculae acceptori finali in processu arcte ordinato tradent.In bacterio Escherichia coli prototypico gram-negativo, duo systemata collectae ferri-sulfuris exsistentes botri, sulphuris botri (ISC) et sulpuris assimilationis meatus (SUF) arcte coniunguntur.Semita regulator ISC, IscR est transcriptio factoris generis helix-turn-helix qui unum botrum ordinare potest.Condiciones redox et ferri seu sulphuris disponibilitatem modulare ligationem status botri sulpuris IscR, qui vicissim determinat seriem switch in DNA specificitatem regulatoris: botrus continens IscR ligare potest ad familiam auctorum generum (type-1) cum. formam racemosam agnoscit tantum secundam sequentiarum globi (type-2).Attamen bacteria ferri-sulfuris botrus in gram-posi tive bacteria non tam bene distincta est, et maxime organismi huius globi unam tantum systematum glomerorum ferri-sulphur globuli ostentant.Notabilis exceptio est unica gram-positiva dissimilis metalli reducendi bacterium Thermincola potens, ubi gena ex utroque systemate cognosci potuit, licet cum organisatione divergentibus ab bacteria gram-negativa.Unam ex his genes encodes functionis IscR homologum demonstravimus et verisimile est in moderandis biogenesis sulphuris uvae ferreae in T. potens implicari.Structural et biochemical characterizationis T. potens et E. coli IscR patefecit insigniter architecturae similis et inexpectata conservatio unicae mechanismi sequentiarum distinctionis propriae huius coetus distinctivi regulatorum transcriptionis.
