Summarize the main topic and purpose of this article.
The article describes the interdisciplinary field of bioinformatics, which combines biology, chemistry, physics, computer science, mathematics, and statistics to develop methods and software tools for understanding and interpreting large and complex biological data. Bioinformatics is commonly used to identify candidate genes and single nucleotide polymorphisms (SNPs), and aids in the analysis of gene and protein expression and regulation. It also plays a role in the understanding of evolutionary aspects of molecular biology, the organization and querying of biological data, and the modeling of DNA, RNA, proteins, and biomolecular interactions in structural biology.