The viral genome is 26–32 kilobases in length. The particles are typically decorated with large (~20 nm), club- or petal-shaped surface projections (the "peplomers" or "spikes"), which in electron micrographs of spherical particles create an image reminiscent of the solar corona.[1][2][3]
^Alfarouk, Khalid O.; AlHoufie, Sari T. S.; Ahmed, Samrein B. M.; Shabana, Mona; Ahmed, Ahmed; Alqahtani, Saad S.; Alqahtani, Ali S.; Alqahtani, Ali M.; Ramadan, AbdelRahman M.; Ahmed, Mohamed E.; Ali, Heyam S.; Bashir, Adil; Devesa, Jesus; Cardone, Rosa A.; Ibrahim, Muntaser E.; Schwartz, Laurent; Reshkin, Stephan J. (21 May 2021). "Pathogenesis and Management of COVID-19". Journal of Xenobiotics. 11 (2): 77–93. doi:10.3390/jox11020006. PMC8163157. PMID34063739.