本品为牛血清白蛋白（BSA，第五组分）的PBS溶液，经0.22 μm滤膜过滤除菌。BSA是一种来源于牛血清的球蛋白，具备以下功能：
① 生理/载体作用：稳定渗透压，结合并运输小分子
② 保护作用：中和毒性物质，保护病毒颗粒及细胞
③ 酶活性维持：在PCR体系中增强Taq酶的稳定性和活性，提升扩增效率
④ 细胞培养支持：替代牛血清添加于DMEM培养基，避免胰酶失活，同时提供营养并保护病毒颗粒，适用于病毒分离等操作
组成
溶质：75 g BSA
溶剂：1 L PBS（磷酸盐缓冲液）
注意事项
① 无菌操作：本品已除菌，使用全程需防止污染；
② 储存条件：请勿反复冻融，以免影响性能；
③ 用途限制：仅限科研或进一步研究使用，不可用于临床诊断或治疗。
This product is a solution of bovine serum albumin (BSA, Fraction V) in PBS, sterilized by filtration through a 0.22 μm membrane. BSA is a globulin derived from bovine serum and exhibits the following functions:
① Physiological/carrier role: stabilizes osmotic pressure, binds and transports small molecules.
② Protective role: neutralizes toxic substances, protects viral particles and cells.
③ Enzyme activity maintenance: enhances the stability and activity of Taq polymerase in PCR systems, improving amplification efficiency.
④ Cell culture support: serves as a serum substitute when added to DMEM medium, prevents trypsin inactivation, provides nutrients, and protects viral particles, making it suitable for virus isolation and related applications.
Composition
Solute: 75 g BSA
Solvent: 1 L PBS (phosphate-buffered saline)
Precautions
① Aseptic handling: This product is already sterile; maintain strict aseptic technique during all usage to prevent contamination.
② Storage conditions: Avoid repeated freeze-thaw cycles to preserve performance.
③ Intended use: For research or further study purposes only; not for clinical diagnosis or therapeutic use.
危险品化学品经营许可证（带存储）