Background: Previously it was shown that the extracts of cryopreserved organ fragments, containing tissue specific peptides, stimulates the reparative regeneration. In order to define the mechanism of action, it is necessary to determine the peptidic composition of extracts.
Objective: To examine molecular-mass distribution of peptides in the extracts of cryopreserved fragments of pigs' heart and spleen as well as piglets' heart and skin.