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Article Abstract

O-Phosphoserine was positively identified as the phosphorylated moiety in human plasma fibronectin by 31P-NMR of intact peptides. These data correlated completely with chemical analyses which demonstrated the presence of O-phosphoserine at a concentration of 2 residues/molecule. Neither O-phosphothreonine nor O-phosphotyrosine was detected in partial acid and partial alkaline hydrolysates, respectively.

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http://dx.doi.org/10.1016/0014-5793(85)80720-1DOI Listing

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