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You are here:Home » Culture Media » Media-Ingredients » Peptone Y (BSE-Free) (Casein Peptone)

Peptone Y (BSE-Free) (Casein Peptone)


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Peptone Y is a specially formulated enzymatic digest of casein, similar to Tryptone from gelatin, but used to supply higher growth rates when used in molecular biology media preparations such as YPD Broth & Agar.
Catalog #P3306
Appearance Light tan, homogenous, free flowing powder
Solubility Clear, light amber, complete
pH (2%) 6.5-7.5
Ash 15%
Moisture 5.0%
Amino Nitrogen 4%
Total Nitrogen 10%
Undigested Proteins Negative
Reducing Sugars Negative
Proteoses Trace positive to positive
Nitrites Negative
Tryptophan Trace positive to positive
Growth Supporting PropertiesAgar Formulation, Broth Formulation: Growth Test
Standard Plate Count: 5000CFU/g
Molds/Yeasts: <100CFU/g
Coliforms: <10CFU/g
E. coli: Negative
Salmonella: Negative/25g
Typical Amino Acid Profile Ala 2.8%, Arg 3.2%, Asp 6.7%, Cys 0.3%, Glu 18%, Gly 1.8%, His 2.4%, Ile 4.7%, Leu 7.7%, Lys 7.0%, Met 2.5%, Phe 4.1%, Pro 9.1%, Ser 5.1%, Thr 3.9%, Trp 1.0%, Tyr 1.3%, Val 6.0%
Certificate of OriginThe raw animal product used in the manufacturing of Peptone Y is derived from casein, a milk product derived from bovine, originating in New Zealand where there have been no reported cases of bovine spongiform encephalopathy (BSE). Peptone Y is processed in Mexico. During processing of the product, a batch is heated to a minimum of 80°C for 1 hour including a minimum of 5 minutes at 105°C or greater and then dried at a minimum of 140°C. The enzyme used in processing is porcine-derived from the USA.
CAS Number73049-73-7
Important NoteThis product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.

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