3.1.3.75 5 - assay at 714357 3.1.3.75 5 - assay at, substrates phospho-L-serine and 4-nitrophenyl phosphate 664697 3.1.3.75 5 6 - 714872 3.1.3.75 5.2 - maximum of kcat-value and minimum for KM-value 706604 3.1.3.75 6.2 7.8 - 714360 3.1.3.75 6.7 - around 654549 3.1.3.75 6.7 - assay at 664211 3.1.3.75 7.4 - assay at, substrates O-phosphocholine and phospho-L-serine 664697 3.1.3.75 9.6 - - 680993