The basic alphabet that describes symbols used in DNA sequences. This alphabet allows not only for the four base nucleotide symbols, but also for various ambiguities, termination, and gap symbols.

The character representations come from the NCBI4na standard and are used in many sequence file formats. The NCBI4na standard is the same as the IUPACna standard with only the addition of the gap character.

The entries in this dictionary are: Symbol - Name A - Adenine C - Cytosine M - A or C G - Guanine R - G or A S - G or C V - G or V or A T - Thymine W - A or T Y - T or C H - A or C or T K - G or T D - G or A or T B - G or T or C - - Gap N - A or G or T or C.

public class DnaAlphabet : IAlphabet, 
	IEnumerable<byte>, IEnumerable

Public Class DnaAlphabet
	Implements IAlphabet, IEnumerable(Of Byte), 
	IEnumerable

public ref class DnaAlphabet : IAlphabet, 
	IEnumerable<unsigned char>, IEnumerable

type DnaAlphabet =  
    class
        interface IAlphabet
        interface IEnumerable<byte>
        interface IEnumerable
    end