Abstract
1. The enzyme system from pig liver responsible for the αβ-elimination of l-serine O-sulphate was purified 1000-fold. 2. Isoelectric focusing produced two enzymically active fractions with isoelectric points at pH5.6 and 5.9 respectively. 3. Osmometry and gel filtration showed both enzymes to possess molecular weights of approx. 54000. 4. The separate activities exhibited similar amino acid compositions.
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- DODGSON K. S., LLOYD A. G., TUDBALL N. O-sulphate esters of L-serine, L-threonine and L-hydroxyproline. Biochem J. 1961 Apr;79:111–117. doi: 10.1042/bj0790111. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Dodgson K. S., Tudball N. Enzymic desulphation of l-serine O[S]-sulphate: the intracellular localization of the enzyme. Biochem J. 1961 Oct;81(1):68–71. doi: 10.1042/bj0810068. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Goodwin T. W., Morton R. A. The spectrophotometric determination of tyrosine and tryptophan in proteins. Biochem J. 1946;40(5-6):628–632. doi: 10.1042/bj0400628. [DOI] [PMC free article] [PubMed] [Google Scholar]
- John R. A., Fasella P. The reaction of L-serine O-sulfate with aspartate aminotransferase. Biochemistry. 1969 Nov;8(11):4477–4482. doi: 10.1021/bi00839a038. [DOI] [PubMed] [Google Scholar]
- LOWRY O. H., ROSEBROUGH N. J., FARR A. L., RANDALL R. J. Protein measurement with the Folin phenol reagent. J Biol Chem. 1951 Nov;193(1):265–275. [PubMed] [Google Scholar]
- Spencer B. Endogenous sulphate acceptors in rat liver. Biochem J. 1960 Nov;77(2):294–304. doi: 10.1042/bj0770294. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Thomas J. H., Tudball N. Studies on the enzymic degradation of L-serine O-sulphate by a rat liver preparation. Biochem J. 1967 Nov;105(2):467–472. doi: 10.1042/bj1050467. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tudball N. The metabolism of potassium l-serine O[S]-sulphate in the rat. Biochem J. 1962 Dec;85(3):456–460. doi: 10.1042/bj0850456. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tudballn, Thmas J. H., Fowler J. A. A rat liver system that catalyses a pyridoxal phosphate-independent alpha beta-eliminto. Biochem J. 1969 Sep;114(2):299–305. doi: 10.1042/bj1140299. [DOI] [PMC free article] [PubMed] [Google Scholar]
- VELICK S. F., VAVRA J. A kinetic and equilibrium analysis of the glutamic oxaloacetate transaminase mechanism. J Biol Chem. 1962 Jul;237:2109–2122. [PubMed] [Google Scholar]
- Vesterberg O., Svensson H. Isoelectric fractionation, analysis, and characterization of ampholytes in natural pH gradients. IV. Further studies on the resolving power in connection with separation of myoglobins. Acta Chem Scand. 1966;20(3):820–834. doi: 10.3891/acta.chem.scand.20-0820. [DOI] [PubMed] [Google Scholar]