SequenceConverter

Class that handles all nucleotide sequence conversions. It provides mapping tables for DNA and RNA complement and transcription, along with methods that apply those maps to input sequences.

Constructor

constructor()

Takes no arguments. Initializes the internal mapping tables.

Properties

Property	Type	Description
MAP_DNA_COMPLEMENT	{ [key: string]: string }	Maps each DNA base to its complement: { A: "T", T: "A", C: "G", G: "C" }
MAP_RNA_COMPLEMENT	{ [key: string]: string }	Maps each RNA base to its complement: { A: "U", U: "A", C: "G", G: "C" }
MAP_DNA_TRANSCRIPT	{ [key: string]: string }	Maps each DNA base to its RNA transcript: { A: "U", T: "A", C: "G", G: "C" }

Methods

Method	Signature	Description
mapSequence	(sequence: string, map: Record<string, string>): string	Applies a character-by-character mapping to the input sequence. Characters not present in the map are passed through unchanged. Returns an empty string if the input is falsy.
getDNAComplement	(seq: string): string	Returns the DNA complement of the input sequence using MAP_DNA_COMPLEMENT.
getRNAComplement	(seq: string): string	Returns the RNA complement of the input sequence using MAP_RNA_COMPLEMENT.
getRNATranscriptFromDNA	(seq: string): string	Returns the RNA transcript of the input DNA sequence using MAP_DNA_TRANSCRIPT.
getDNAReverseComplement	(seq: string): string	Returns the reverse complement of the input DNA sequence. The sequence is first complemented, then reversed.
getOutputSequence	(sequence: string, conversionType: ConversionType): string	Dispatches to the appropriate conversion method based on conversionType. Returns an empty string for unrecognized types.
getLabel	(conversionType: ConversionType): string	Returns a human-readable label for the conversion type (e.g., "Complement DNA", "RNA Transcript").
isDNAType	(type: ConversionType): boolean	Returns true if the conversion type starts with "DNA".
isRNAType	(type: ConversionType): boolean	Returns true if the conversion type starts with "RNA".

Example

import { SequenceConverter } from "./logic/SequenceConverter";

const converter = new SequenceConverter();

// DNA complement
const complement = converter.getDNAComplement("ATGC");
// complement === "TACG"

// DNA reverse complement
const revComp = converter.getDNAReverseComplement("ATGC");
// revComp === "GCAT"

// RNA transcript from DNA
const transcript = converter.getRNATranscriptFromDNA("ATGC");
// transcript === "UACG"

// Dispatch by conversion type
const output = converter.getOutputSequence("ATGC", "DNA_REVERSE_COMPLEMENT");
// output === "GCAT"