Bioinformatics Tools, Databases, and Data Formats: A Functional Overview for Introductory Sequence-Based and NGS Workflows

Bioinformatics has become a central component of biological and biomedical research, supporting the organization, analysis, interpretation, and integration of large-scale biological data. The rapid expansion of high-throughput technologies, particularly next-generation sequencing, has led to the development of numerous tools, databases, and data formats that address different stages of sequence-based and NGS-oriented bioinformatics workflows. This article presents a structured overview of representative bioinformatics resources and proposes a functional taxonomy for introductory sequence-based and NGS-oriented workflows. The taxonomy organizes resources into major functional categories, including genomic databases and browsers, sequence and data analysis tools, sequence alignment and search tools, gene prediction tools, protein-level interpretation resources, data retrieval and mining platforms, and biological data formats. Representative resources such as the UCSC Genome Browser, Ensembl, NCBI databases, FastQC, Trimmomatic, Cutadapt, trimAl, BLAST, ClustalW, MAFFT, MUSCLE, BWA, Bowtie, GENSCAN, ExPASy, PhosphoSitePlus, PIR, and BioMart as well as widely used data formats are described and compared. By summarizing their purposes, inputs, outputs, strengths, limitations, availability, and common applications, this review provides a systematic reference for students, early-career researchers, and non-specialist users seeking to navigate representative bioinformatics tools, databases, platforms, and data formats within introductory sequence-based and NGS-oriented analytical workflows.