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Protein Digestion

Protein Digestion

Protein digestion begins in the stomach, where the highly acidic environment can easily disrupt protein structure by exposing the peptide bonds of polypeptide chains. After polypeptide chains are broken into individual amino acids by a series of digestive enzymes, the amino acids are transported to the liver via the bloodstream to produce energy.

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Updated: Mar 17, 2026

GENPLAT: an Automated Platform for Biomass Enzyme Discovery and Cocktail Optimization

GENPLAT: an Automated Platform for Biomass Enzyme Discovery and Cocktail Optimization

Published on: October 24, 2011

Encapsulated enzyme cocktail as feed additives for improving efficiency and nutrient digestibility in broilers.

Hamza Rafeeq¹, Muhammad Anjum Zia²

¹Department of Biochemistry, University of Agriculture Faisalabad, Faisalabad, Punjab 38040, Pakistan; Department of Biochemistry, Riphah international University, Faisalabad Campus, Punjab 44000, Pakistan.

Poultry Science

|March 15, 2026

Summary

Encapsulated enzyme mixtures containing protease, lipase, cellulase, and amylase significantly improved broiler performance and nutrient digestibility. This enzyme supplementation enhances carcass yield and offers a cost-effective strategy for sustainable poultry farming.

Keywords:

Broiler chicken Carcass characteristic Encapsulated enzyme Growth performance Nutrient digestibility

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Area of Science:

Animal Science
Nutritional Biochemistry
Poultry Science

Background:

Feed cost is a primary economic constraint in broiler production.
Efficient nutrient utilization is critical for sustainable broiler farming.
Enzyme supplementation can enhance nutrient digestibility and growth performance.

Purpose of the Study:

To evaluate the impact of an encapsulated multi-enzyme mixture on broiler growth, carcass traits, and nutrient digestibility.
To assess enzyme efficacy under varying dietary calorie levels and inclusion rates.

Main Methods:

120 Ross-308 broiler chicks were assigned to six dietary treatments with varying enzyme levels (0, 500, 1000 U/kg) in low- and high-calorie diets.
Growth performance, carcass characteristics, and nutrient digestibility were measured.
Data were analyzed using one-way ANOVA with Tukey's test.

Main Results:

Enzyme supplementation significantly improved body weight gain and feed conversion ratio (p < 0.0001).
Higher enzyme inclusion levels enhanced carcass yield, including dressing percentage, breast, and thigh weight (p < 0.0001).
Digestibility of crude protein, crude fiber, and ether extract was significantly improved (p < 0.0001).

Conclusions:

Encapsulated multi-enzyme supplementation effectively improves broiler performance and nutrient utilization.
Enzymes demonstrate potential for reducing feed costs and increasing poultry production efficiency.
Enzyme-based feed strategies are beneficial in both low- and high-calorie diets for broilers.