胎牛血清是胎牛血液凝固后，去除血漿中纖維蛋白原及某些凝血因子后分離出的淡黃色澄清液體。胎牛血清是細胞培養中用量最大的天然培養基，含有豐富的細胞生長必須的營養成分，具有極為重要的功能,般添加比例為 5-20%。血清中含有各種氨基酸、維生素、無機物、脂類物質等這些維持細胞生長必須的營養物質，也含有胰島素、bFGE、EGF、PDGF、轉鐵蛋白等可促進細胞生長的生長因子及蛋白。此外，血清還有解毒、緩沖、抑制蛋白酶活性等作用，保護細胞不受傷害。
依科賽胎牛血清均采自非疫區的健康牛，經無菌采集、批量混合、3 級 100 nm 過濾分裝而成，不含支原體和 BVDV、PI3、IBR、BPV 等牛源病毒。
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