Specialty acid protease enzyme for use in propagation and fermentation

Safety Sheet | Data Sheet


SZM AP-1+ is a purified native acid protease enzyme that breaks down proteins to yield shorter chain peptides and amino acids. Its application provides yeast nutrients in the form of essential and non-essential amino acids, peptides, and free amino nitrogen. It may also improve access of other hydrolytic enzymes to “bound” starch by breaking down structural proteins.

Typical Characteristics

  • ‍Activity: 125 PROT-B/G
  • Appearance: Amber
  • pH: 3.0–5.0
  • Bulk Density: 1.17–1.20 g/mL

Performance Benefits

SZM AP-1+ provides the following benefits to ethanol producers.

  • Higher ethanol yields
  • Enhanced yeast performance
  • Improved corn oil production
  • Lower glycerol concentrations throughout fermentation
  • Higher dosages of SZM AP-1+ have shown where the urea/ammonia usage can be reduced due to the increased FAN that SZM AP-1+ is providing the fermentation

Dosage Recommendation

SZM AP-1+ should be dosed at 0.0030–0.0050% weight enzyme / weight as is corn. The actual dose required will depend upon the conditions of your fermentation: time, initial pH, and the level of solids.

Regulatory Status

  • ISO 9001 registered company
  • Kosher certified
  • GRAS (Generally Recognized as Safe)

GM Status

This product is not a GMO. The enzyme product is manufactured by fermentation of microorganisms that are not present in the final product. The production organisms and the enzyme effectiveness are improved by means of modern technology.


SZM AP-1+ is available in totes.


SZM AP-1+ will meet the declared activity upon arrival at the plant.

Recommended storage: 0–25°C (32°–77°F) Packing must be kept intact, dry, and away from sunlight. Please follow the recommendations and use the product before the best before date to avoid the need for a higher dosage.

Best before: The best before date can be found in the COA or on the product label. The product gives optimal performance when stored as recommended and used prior to the best-before date.

Safety and Enzyme Handling

SZM AP-1+ contains proteins obtained from large-scale cultures of a mold. Proteins may cause an allergic-type reaction in sensitized individuals that could require immediate medical attention. Prolonged direct contact may cause minor irritation to skin, eyes, or mucus membranes. For detailed handling information, please refer to the appropriate Safety Data Sheet.

Technical service

CTE Global, Inc. is committed to formulating a productive and mutually beneficial relationship with ethanol producers in order to make their fermentation process as consistent, efficient, and cost-effective as possible.

Contact us with any questions or for more information about this product.


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