Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Link to relevant study record(s)

Description of key information

The animal and vegetable cells are formed mainly by proteins, which constitute more than the half of the dry weight of the cell. These components and their degradation products are constantly present in the animal and human diet and in the environment. These components are involved in natural metabolic pathways.


After ingestion, proteins are hydrolyzed in the gastrointestinal tract by proteolytic enzymes derived from the pancreas resulting in the release of dipeptides, tripeptides and free amino acids. Digestion is further enhanced by proteases, such as aminopeptidase N, that are located in the plasma membrane of the intestinal cells. Single amino acids, as well as di- and tripeptides, are transported into the intestinal cells from the lumen and subsequently released into the blood for absorption by other tissues. The final digestion products are then used by the cells for the biosynthesis of new specific proteins, or they can then undergo further amino acid catabolism, where they are utilized as an energy source.

Key value for chemical safety assessment

Bioaccumulation potential:
no bioaccumulation potential

Additional information