半岛bd体育手机客户端 说明
生化/生理作用
Human DNA topoisomerase I catalyzes the relaxation of both positive and negative supercoils without the requirement of energy. In addition to DNA replication and transcriptional activation, DNA topoisomerase I also plays a major role in pre-mRNA splicing, recombination, chromatin remodeling and other DNA or RNA templating activities. The C terminal domain of DNA topoisomerase I spanning from amino acids 713 to 765 is highly conserved and connected to the core domain by a poorly conserved linker domain (residues 636-713). An active site tyrosine has been characterized at position 723. Mutation of this tyrosine to phenylalanine at position 723 causes topo I to preferentially bind the supercoiled DNA rather than relaxed DNA in the mixture of supercoiled and relaxed DNA.
外形
Clear and colorless frozen liquid solution
制备说明
Use a manual defrost freezer and avoid repeated freeze-thaw cycles. While working, please keep sample on ice.
基本信息
| NACRES | NA.26 |
半岛bd体育手机客户端 性质
| 生物来源 | human |
| 重组 | expressed in insect cells |
| 测定 | ≥80% (SDS-PAGE) |
| 形式 | frozen liquid |
| 分子量 | ~15.2 kDa |
| 包装 | pkg of 5 μg |
| 储存条件 | avoid repeated freeze/thaw cycles |
| 浓度 | 500 μg/mL |
| 颜色 | clear colorless |
| NCBI登记号 | NM_003286 |
| UniProt登记号 | P11387 |
| 运输 | dry ice |
| 储存温度 | ?70℃ |
| Gene Information | human ... TOP1(7150) |
安全信息
| 储存分类代码 | 10 - Combustible liquids |
| WGK | WGK 1 |
| 闪点(F) | Not applicable |
| 闪点(C) | Not applicable |
Sigma-Aldrich
m.cnreagent.com
