This workshop will introduce the basic principles of DNA methylation and briefly describe available methods for DNA methylation assessment, focusing on bisulfite sequencing (BSseq). We will cover the principles of BSseq preprocessing, alignment and methylation calling, differential methylation analysis, annotation and visualization. Attendees will have the opportunity to work on real DNA methylation data provided by the instructor and run the analysis on Hoffman2 and locally. Attendees need to have a basic knowledge in UNIX commands and R programming for this workshop. No previous experience with NGS or DNA methylation analysis is necessary.