Complex sentence: In the laboratories of the Institute of Medical Pharmacology, University of Rome, he isolated from amphibians and mollusks more than fifty new bioactive peptides, which became the subjects of numerous studies in other laboratories of Europe and North America.
Split into simpler sentences: In the laboratories of the Institute of Medical Pharmacology, University of Rome, he isolated from amphibians and mollusks more than fifty new bioactive peptides. These became the subjects of numerous studies in other laboratories in Europe and North America.