胎牛血清是胎牛血液凝固后，去除血浆中纤维蛋白原及某些凝血因子后分离出的淡黄色澄清液体。胎牛血清是细胞培养中用量最大的天然培养基，含有丰富的细胞生长必须的营养成分，具有极为重要的功能,般添加比例为 5-20%。血清中含有各种氨基酸、维生素、无机物、脂类物质等这些维持细胞生长必须的营养物质，也含有胰岛素、bFGE、EGF、PDGF、转铁蛋白等可促进细胞生长的生长因子及蛋白。此外，血清还有解毒、缓冲、抑制蛋白酶活性等作用，保护细胞不受伤害。
依科赛胎牛血清均采自非疫区的健康牛，经无菌采集、批量混合、3 级 100 nm 过滤分装而成，不含支原体和 BVDV、PI3、IBR、BPV 等牛源病毒。
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