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Yeast Extract Powder

For preparation of microbial culture media

SKU AS-1010 Categories ,
Catalog Number: AS-1010
CAS Number: 8013-01-2

Yeast extract powder is an essential component in microbiology. It produced by drying yeast cell extract. It is a rich source of vital nutrients which support the growth of bacteria. Powdered yeast extract is a complicated combination made up of:
Carbon and Nitrogen Sources: It supplies carbon and nitrogen, which are crucial building components for bacterial cells and are frequently scarce in culture conditions.
Vitamins: B vitamins, which are essential for a number of bacterial metabolic functions, are especially high in it.
Free Amino Acids: Bacteria can directly incorporate these readily available amino acids to produce proteins.
Growth Factors: In addition to providing nucleotides and trace elements, yeast extract powder also provides other growth factors that promote the best possible growth of bacteria.

Shelf life and storage
Store yeast extract powder 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.

Typical analysis
Powder appearanceLight yellow to brownish yellow, homogenous, free flowing
SolubilityCompletely soluble in water, insoluble in alcohol
2% solution appearanceClear, light yellow
pH (2% in water)6.5 – 7.5
Chemical analysis
Total nitrogen≥10.5
Sodium chloride≤5
Amino nitrogen≥4.5
Moisture≤6
Amino acid composition (mg/g)
Aspartic acid65
Threonine26
Serine24
Glutamic acid115
Proline23
Glycine30
Alanine48
Cysteine
Methionine9
Isoleucine31
Leucine42
Tyrosine11
Phenylalanine26
Histidine14
Lysine46
Arginine32
Tryptophan
Microbial Quality ControlCultural response after 18-48 hours incubation at 35-37 °C on Plate Count Agar (AS-1328) prepared by Yeast Extract as a component.
StrainATCCGrowth
Escherichia coli25922Luxuriant
Streptococcus pyogenes19615Luxuriant
Staphylococcus aureus25923Luxuriant
Enterococcus faecalis29212Luxuriant
Bacillus subtilis6633Luxuriant
Lactobacillus casei9595Luxuriant

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