There are three options to find your protein of interest:
1. Enter a protein identifier, being either the UniProtKB identifier, PLAZA identifier or a species annotation specific identifier (e.g. for Arabadopsis this is an ATG code). For more info of the species annotation see Resources.
2. Enter the protein sequence or part thereof. Proteins exactly matching the sequence will be displayed.
3. Enter a keyword that matches the description of the protein. For instance to find histones one can query "histone".
"The Plant PTM Viewer, a central resource for exploring plant protein modifications"
Willems P, Horne A, Van Parys T, Goormachtig S, De Smet I, Botzki A, Van Breusegem F, Gevaert K. ; Plant J. 2019 Aug;99(4):752-762.