Chargaff's rules (DNA base composition) (Mole fraction A equals T; G equals C (double-stranded DNA))

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Mole fraction A equals T; G equals C (double-stranded DNA)

What each symbol means

SymbolWhat it stands for
A,T,G,CBases in complementary strands

When to use this

Applies to double-stranded DNA; %A=%T and %G=%C; follows from Watson–Crick pairing.