PubMed Central (PMC) (541.249 recursos) PubMed Central (PMC) is the U.S. National Library of Medicine's digital archive of life sciences journal literature. Access to journal articles is free and unrestricted. Example journals include Antimicrobial Agents and Chemotherapy, Eukaryotic Cell, Journal of Bacteriology, Plant Physiology, and the Proceedings of the National Academy of Sciences of the United States of America.