This protocol, published in Nature Protocols, provides detailed instructions for DNA methylation analysis. DNA methylation is a crucial epigenetic modification involved in gene regulation, development, and disease. The protocol likely covers methods for detecting and quantifying DNA methylation patterns, which often involve bisulfite treatment of DNA. Bisulfite conversion converts unmethylated cytosines to uracils while leaving methylated cytosines unchanged, thereby transforming epigenetic information into genetic information that can be read by sequencing. Nature Protocols is a highly respected journal known for publishing reproducible, step-by-step laboratory protocols. This resource is invaluable for researchers in epigenetics, molecular biology, and genomics who need to accurately assess DNA methylation states at single-nucleotide resolution or on a genome-wide scale. Applications include studying the role of DNA methylation in cancer, developmental biology, and other diseases, as well as using methylation markers for diagnosis. The protocol ensures rigorous and standardized approaches to DNA methylation analysis.