Isoglutamyl lysine isopeptide (Gln-Lys) (interchain with K-? in acceptor proteins)
Schiff-base intermediate with D-ribose 5-phosphate
D-methionine transport system substrate-binding protein
Cysteine sulfenic acid (-SOH) intermediate; for peroxidase activity
Cytochrome bc1 complex cytochrome c subunit
Cytochrome bc1 complex Rieske iron-sulfur subunit
Isoglutamyl lysine isopeptide (Lys-Gln) (interchain with Q-Cter in protein Pup)
Cysteine sulfenic acid (-SOH) intermediate
2-(S-cysteinyl)pyruvic acid O-phosphothioketal