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上海乾思生物科技有限公司
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培養基主要原料介紹

時間:2011/11/8閱讀:1107
分享:

    蛋白胨是一種外觀呈淡黃色的粉劑,具有肉香的特殊氣息。它作為微生物培養基的主要原料,在抗生素,醫藥工業,發酵工業,生化制品及微生物學科研等領域中的用量均很大;不同的生物體需要特定的氨基酸和多肽,因此存在各種蛋白胨,一般來說,用于蛋白胨生產的蛋白包括動物蛋白(酪蛋白、肉類)和植物蛋白(豆類)兩種。蛋白胨當中不僅含有豐富的氨基酸,特別是含硫氨基酸較多,而且含有更多的細菌生長需要的維生素和其它生長因子。是生物制藥發酵及各種培養基制備的基礎原材料。在培養基當中它起的主要作用是提供氮源。胰酪蛋白胨(Casein Tryptone)是一種蛋白胨,亦稱胰酶蛋白胨(Pancreatic digestof Casein),或稱胰蛋白胨。該蛋白胨系采用酪蛋白經胰酶消化后,濃縮干燥而成的淺黃色粉末,具有色淺、易溶、透明、無沉淀等良好物理性狀。可配制各種微生物培養基。

    蛋白胨的用途:實驗室用作培養基,培養細菌。食品中用作提高蛋白含量。用于飼料中顯著降低了飼料廠的生產成本,是飼料行業中蛋白源不足的良好佳品。
    大豆蛋白胨是是用大豆為基質,采用新工藝提取而成的淡黃色粉末,含有多種營養成份,適合做微生物培養用原料。專門用于培養鏈球菌、肺炎球菌、布氏桿菌等,營養豐富,也可用做工業化生產的發酵原料。牛肉蛋白胨用新鮮精牛肉,采用工藝精致而成的類白色粉末。適合奈瑟氏菌、沙門氏菌屬等生長。牛肉浸膏用新鮮牛肉經過剔除脂肪、消化、過濾、濃縮而得到的一種棕黃色至棕褐色的膏狀物。色澤呈微黃色適宜于各種微生物培養基的基礎及發酵材料。牛肉膏當中含有肌酸、肌酸酐、多肽類、氨基酸類、核苷酸類、有機酸類、礦物質類及維生素類的水溶性物質。該產品廣泛應用于生物制藥發酵及各種培養基的制備。在培養基當中它起的主要作用是補充蛋白胨以及其它氮源的營養不足。多價胨采用**生物提取工藝精致而成,為淡黃色干燥粉末,營養極為豐富,可做多種培養基的基礎。酪蛋白胨是用酪蛋白經胰酶水解精制而成,色澤呈淡黃色或白色。月示胨采用精蛋白為基質,經特殊水解提取制備的干燥粉末,營養極為豐富,可做多種培養基的基礎。骨蛋白胨系蛋白質分解產物,如將牛肉、酪蛋白、牛奶粉、白明膠、大豆蛋白、絲蛋白、血纖維蛋白等為原料,經不*的水解工藝所得的產物。市售產品以淡黃至棕黃色粉劑為主。其分子量介于月示和肽之間,約2000左右。不同來源的蛋白質和不同的水解條件,其水解物中組成可千差萬別。所以胨往往是一個復雜的多肽混合物。可溶于水,過熱不凝固,在飽和硫酸銨中不發生沉淀但可為蛋白質沉淀劑所沉淀。可用作微生物和動物細胞培養基、特種功能性食品和化妝品的配料,也有用作啤酒等產品的穩定劑。鮮骨蛋白胨采用新鮮骨為原料,經發酵噴霧干燥而成。 廣泛用于黃原膠、食品添加劑、醫藥中間體、生物制品等發酵產品中。

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