biopython

Parsing a FASTA file extracts biological sequences and their associated metadata headers. The toolkit reads standard FASTA formats, validates the input, and returns structured sequence data ready for downstream analysis.

DNA to protein translation converts nucleotide codons into an amino acid chain. The toolkit performs translation across DNA, RNA, and protein sequences, applying standard genetic code rules to return the resulting protein string.

Calculating molecular weight and pI computes the physicochemical properties of a protein. The toolkit derives these values from the amino acid composition, returning precise mass and isoelectric point measurements for the input sequence.

The toolkit operates without external dependencies, requiring no additional libraries. It handles FASTA parsing, sequence translation, and property computation natively with built-in input validation and error handling.

Analyzing composition counts the frequency of each nucleotide or amino acid in a sequence. The toolkit processes parsed FASTA data to calculate composition, returning a structured breakdown of sequence elements for bioinformatics workflows.