Use this molecular-biology calculation when the sequence orientation, reading frame, absorbance blank, path-length normalization, or primer coordinates match the tool's stated convention.

Sequence

A sequence, category, or text value.

The implementation follows this calculation rule: Map each DNA base to its complement, pairing A with T and G with C.^[1]

Complement strand

The calculated complement strand.

Spectral ratios are contamination indicators rather than proof of sample identity or integrity, and sequence calculations depend on the supplied symbols and coordinate convention. Low concentration, an incorrect blank, mixed templates, or incomplete codons can make a mathematically valid result misleading. Preserve the input values and units so the result can be audited and recalculated.

For nucleic-acid quantity or purity, compare absorbance with a dye-based assay and an integrity check. For sequence calculations, verify orientation and reading frame with an alignment, primer-analysis, or translation tool.

• Reverse Complement

  Build the reverse complement of a DNA sequence by complementing bases then reversing.

• Transcribe To RNA

  Transcribe a DNA sequence to RNA by replacing every thymine with uracil.

• GC Content Calculator

  Calculate the percentage of G and C bases in a DNA sequence.