We have defined the glycomics-informed, site-specific microheterogeneity of 22 sites of N-linked glycosylation per monomer on a SARS-CoV-2 trimer and the six sites of N-linked glycosylation on a soluble version of its human ACE2 receptor by using a combination of mass spectrometry approaches coupled with evolutionary and variant sequence analyses to provide a detailed understanding of the glycosylation states of these glycoproteins (Figures 1, 2, 3, 4, 5, and 6).