Interesting query/observation on Amino Anomalies

[SeManTics]

Just an interesting observation...there's no Phosphate in amino acids...why?

[Mike H]

Because amino acids, by definition, don't contain a phosphate group.

However, phosphorylated amino acids play a role in analytical biochemistry as well as metabolism, cell signaling, and the like.

There are polymeric compounds that have a phosphorus-nitrogen backbone (see, for example, the work of Harry Allcock at Penn State University), but they're not phosphates.