Peptone from Casein, Tryptone
Catalog Number: AS-1006
CAS Number: 91079-40-2
Enzymatic digestion (hydrolysis) of casein, the primary protein in milk, yields a complex combination known as tryptone. As a rich source of nutrients for bacterial growth, it is useful in microbiology laboratories.
One of the many free amino acids that can be found in tryptone is tryptophan, which is present in particularly high concentrations. This can be useful in cultivating bacteria that need tryptophan for specific metabolic processes. The lack of observable carbohydrates is another benefit of tryptone. This allows to use in culture media formulations where the presence of carbohydrates might interfere with specific test results.
Shelf life and storage
Store Peptone from Casein, Tryptone between 10-30 °C in a ventilated and low humidity place and protected from light. Close the container tightly after use. Use before expiry date.
Note that this product is for R&D use only. DO NOT USE for drug, household, or any other uses.
Peptone from Casein, Tryptone
Typical analysis
Powder appearance Beige, free flowing Solubility Freely soluble in water, not soluble in alcohol 1% solution appearance clear pH (10% in water) 6.3 – 7.3 Chemical analysis
Total nitrogen ≥11 Sodium chloride ≤5 Amino nitrogen ≥4 Moisture ≤11 Amino acid composition (mg/g)
Aspartic acid 54 Threonine 32 Serine 41 Glutamic acid 167 Proline 81 Glycine 15 Alanine 24 Cysteine 2 Valine 50 Methionine 17 Isoleucine 40 Leucine 70 Tyrosine 30 Phenylalanine 39 Histidine 21 Lysine 60 Arginine 28 Tryptophan 10 Microbial Quality Control Cultural response after 18-48 hours incubation at 35-37 °C on Soybean Casein Digest Medium (AS-1370) prepared by Tryptone as a component.
Strain ATCC Growth Escherichia coli 25922 Luxuriant Salmonella typhi 6539 Luxuriant Staphylococcus aureus 25923 Luxuriant Enterococcus faecalis 11700 Luxuriant Klebsiella pneumoniae 13883 Luxuriant
