L-Cystine CAS: 56-89-3 99% Farin lu'ulu'u ko lu'ulu'u na lu'ulu'u
| Lambar Catalog | Saukewa: XD90322 |
| Sunan samfur | L-Cystine |
| CAS | 56-89-3 |
| Tsarin kwayoyin halitta | Saukewa: C6H12N2O4S2 |
| Nauyin Kwayoyin Halitta | 240.30 |
| Bayanin Ajiya | yanayi |
| Harmonized Tariff Code | 29309013 |
Ƙayyadaddun samfur
| Bayyanar | Farin lu'ulu'u ko lu'ulu'u masu launin fari |
| Assay | 99% |
| Daraja | USP32 |
| Takamaiman juyawa | -215 zuwa -225° |
| Karfe masu nauyi | <0.0015% |
| AS | 1.5ppm max |
| SO4 | 0.040% max |
| Fe | <0.003% |
| Asara akan bushewa | 0.20% max |
| Ragowa akan Ignition | 0.10% max |
| Cl | 0.10% max |
Tsarin crystal na carboxypeptidase T (CpT) tare da phenylalanine da arginine substrate analogs - benzylsuccinic acid da (2-guanidinoethylmercapto) succinic acid - an ƙaddara ta hanyar maye gurbin kwayoyin halitta a ƙuduri na 1.57 Å da 1.62 Å don fayyace ƙayyadaddun ƙayyadaddun bayanan martaba. da enzyme.Ragowar Leu211 da Leu254 masu ra'ayin mazan jiya (kuma suna cikin duka carboxypeptidase A da carboxypeptidase B) an nuna su azaman ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun abubuwan hydrophobic, yayin da Asp263 ya kasance don sanin abubuwan da aka caje.Maye gurbi na waɗannan ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun bayanin martaba: bambance-bambancen CpT Leu211Gln yana samun kaddarorin carboxypeptidase B, da bambancin CpT Asp263Asn da carboxypeptidase A-kamar zaɓi.An nuna madauki na Pro248-Asp258 da ke hulɗa tare da Leu254 da Tyr255 yana da alhakin sanin ragowar C-terminal na substrate.Daure mai dauri a rukunin S1' yana kaiwa zuwa madaidaicin ligand-dep endent motsi na wannan madauki, kuma Leu254 motsi sarkar gefe yana haifar da sake fasalin daidaituwar ragowar Glu277 mai mahimmanci don catalysis.Wannan sabon hangen nesa ne game da zaɓin substrate na metallocarboxypeptidases wanda ke nuna mahimmancin hulɗa tsakanin rukunin S1' da cibiyar catalytic.
