* Nucleic acids (DNA and RNA) have a phosphate backbone, where each nucleotide is linked to the next by a phosphate group.
* Proteins contain phosphorus in the form of phosphate groups that are often attached to amino acid side chains, playing a crucial role in protein structure and function.
While both nucleic acids and proteins contain other elements like carbon (C), hydrogen (H), oxygen (O), and nitrogen (N), phosphorus is unique in that it is present in both.
