Mass spectrometry 6 negative ion electrospray Article 4 high performance liquid chromatography 4 matrix assisted laser desorption ionization time of flight mass spectrometry 4 nonhuman 4 positive ion electrospray 4 unclassified drug 4 Acids 2 Acylation 2 Amino Acid Motifs 2 Antrodia malicola 2 Bacteria 2 Bacterial Proteins 2 Basidiomycete 2 Brucella 2 Brucella abortus 2 Brucella suis 2 Cell membranes 2 Core oligosaccharide 2 Coriolellus malicola 2 Fungal metabolites 2 Fungi 2 Glycoproteins 2 Glycoproteomics 2 Glycosylation 2 Gram-negative bacteria 2 L. kefiri 2 Lactobacillus 2 Lactobacillus buchneri 2