Dizileme

Dizileme, in Turkish, refers to the process of determining the order of nucleotides in DNA or RNA, effectively decoding genetic information. It is a central technique in genomics, transcriptomics, and molecular biology, enabling researchers to read genetic material at varying scales from single genes to entire genomes.

Historically, Sanger sequencing established the foundational method for sequencing short DNA fragments based on chain termination. In the last two decades, high-throughput or next-generation sequencing (NGS) technologies have transformed the field by enabling massive parallel sequencing of millions to billions of fragments. Prominent today are Illumina-based short-read platforms, as well as long-read technologies from PacBio and Oxford Nanopore, which better resolve complex regions and structural variants.

Common sequencing approaches include whole-genome sequencing (WGS), whole-exome sequencing (WES), targeted sequencing panels, and RNA sequencing (RNA-Seq) to study transcriptomes. The sequencing workflow typically involves sample preparation and library construction, sequencing runs, and extensive data analysis, including quality control, sequence alignment or assembly, variant calling, and downstream annotation.

Applications of dizileme span medical genetics and diagnostics, cancer genomics, infectious disease surveillance, evolutionary biology, agriculture, microbiology, and forensic science. Challenges include managing large data volumes, interpreting variants of uncertain significance, balancing cost and accuracy, and addressing privacy and ethical concerns related to genetic information. The field continues to evolve with improvements in read length, accuracy, and integrated multi-omics approaches, expanding the scope and impact of sequencing in science and medicine.