Table II.

Summary of glycosylation types and sites in the PDB as of July 2020

Types	Glycosylated amino acids	Number of PDB structures	Bond length range (99% coverage)
N-linked glycosylation	ASN/ARG	7073	1.20–1.60 Å
O-linked glycosylation	SER/THR/TYR	473	1.10–1.55 Å
S-linked glycosylation	CYS	6	1.55–2.00 Å
C-linked mannosylation	TRP	16	1.05–1.65 Å