scholarly journals Purification and properties of rat brain pyruvate carboxylase

1975 ◽  
Vol 145 (1) ◽  
pp. 25-35 ◽  
Author(s):  
D E Mahan ◽  
I K Mushahwar ◽  
R E Koeppe

Rat brain pyruvate carboxylase was purified 2000-fold and some of its properties and kinetic parameters were investigated. The use of (NH4)2SO4 gradient solubilization on a Celite column and precipitation with polyethylene glycol permitted purification to an estimated 20% purity. Except for a few subtle kinetic differences this enzyme is indistinguishable from rat liver pyruvate carboxylase.

1975 ◽  
Vol 147 (3) ◽  
pp. 385.b1-385.b1
Author(s):  
H. O. Spivey ◽  
W. Flory ◽  
B. D. Peczon ◽  
J. P. Chandler ◽  
R. E. Koeppe

Author(s):  
C.D. Seufert ◽  
E. Herlemann ◽  
E. Albrecht ◽  
W. Seubert

1978 ◽  
Vol 175 (2) ◽  
pp. 765-768 ◽  
Author(s):  
T Noguchi ◽  
Y Takada

Pyruvate (glyoxylate) aminotransferase from rat liver peroxisomes was highly purified and characterized. The enzyme preparation has a mol.wt. of approx. 80,000 with two identical subunits, and isoelectric point of 8.0 and a pH optimum between 8.0 and 8.5. The enzyme catalysed transamination between a number of L-amino acids and pyruvate or glyoxylate. The effective amino acceptors were pyruvate, phenylpyruvate and glyoxylate with serine, and glyoxylate and phenylpyruvate with alanine as amino donor. These properties and kinetic parameters of the enzyme are remarkably similar to those previously described for mitochondrial alanine-glyoxylate aminotransferase isoenzyme 1 from glucagon-injected rat liver [Noguchi, Okuno, Takada, Minatogawa, Okai & Kido (1978, Biochem. J. 169, 113-122].


1971 ◽  
Vol 122 (3) ◽  
pp. 353-362 ◽  
Author(s):  
J. Bar–Tana ◽  
G. Rose ◽  
B. Shapiro

The isolation and purification of palmitoyl-CoA synthetase from rat liver microsomes is described. Several methods suitable for enzyme assay are described. The general properties and kinetic parameters of the purified enzyme were determined and are discussed in relationship to microsomal fatty acid activation.


1969 ◽  
Vol 244 (13) ◽  
pp. 3618-3624 ◽  
Author(s):  
F A Valeriote ◽  
F Auricchio ◽  
G M Tomkins ◽  
D Riley

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