
1) Amino acid
Found on
https://www.crosswordclues.com/clue/phosphoserine

Phosphoserine is an ester of serine and phosphoric acid. Phosphoserine is a component of many proteins as the result of posttranslational modifications. The phosphorylation of the alcohol functional group in serine to produce phosphoserine is catalyzed by various types of kinases. It is a normal metabolite found in human biofluids. ...
Found on
http://en.wikipedia.org/wiki/Phosphoserine

<chemical> The phosphoric acid ester of serine. Used as an identifier in the analysis of peptides, proteins, and enzymes. ... Pharmacological action: indicators and reagents. ... Chemical name: DL-Serine, dihydrogen phosphate (ester) ... (12 Dec 1998) ...
Found on
http://www.encyclo.co.uk/local/20973
No exact match found.