Wuhan Seafood Market Pneumonia Virus Structure (IMAGE) University of California - Santa Cruz Caption The virus structure is made up of at least three viral proteins, the spike protein, the membrane protein and the envelope protein. Credit From Mechanisms of Coronavirus Cell Entry Mediated by the Viral Spike Protein Belouzard et al, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3397359/ Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.