Read mapping is defined as a genomic sub-algorithmic process that aligns short sequencing reads to known reference sequences to determine their specific locations within the genome or transcriptome, utilizing either heuristic approximations or exhaustive dynamic programming frameworks. Theoretically, this mechanism operates on formal definitions involving k-mers for seed identification, suffix-based indexing structures (such as Burrows-Wheeler Transformations and FM indexes) for efficient lookup, and statistical normalization metrics (e.g., TPM, RPKM) to quantify expression levels while correcting for sequence length and sequencing depth. As a foundational operation in bioinformatics, read mapping serves the parent discipline of genomics by enabling critical downstream analyses including variant calling, gene expression profiling, epigenomic marking detection, and transcriptome assembly through comparative statistical testing on high-dimensional count data.
Read mapping is defined as a genomic sub-algorithmic process that aligns short sequencing reads to known reference sequences to determine their specific locations within the genome or transcriptome, …