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Radiation inactivation was used to determine the functional molecular weight of lipoprotein lipase (LPL) in rat heart and adipose tissues. This technique reveals the size of the smallest unit required to carry out the enzyme function. Supernatant fractions of the tissue homogenates were exposed to high energy electrons at -135 degrees C. LPL activity showed a simple exponential decay in all samples tested. Because changes in nutritional state shift the distribution of LPL between the capillary endothelial and parenchymal cells within heart and adipose tissues, fasted and refed rats were used for the radiation studies. The functional molecular weight was calculated to be 127,000 +/- 15,000 (mean +/- SD) daltons for heart and adipose. Thus, the smallest unit required for enzyme function was the same in both of these tissues and did not vary with nutritional state. The data suggest that, compared with LPL monomer sizes reported in the range 55,000 to 72,000, this active unit constitutes a dimer.
A S Garfinkel, and
E S Kempner, and
O Ben-Zeev, and
J Nikazy, and
S J James, and
M C Schotz
June 1985,
The Journal of biological chemistry,
A S Garfinkel, and
E S Kempner, and
O Ben-Zeev, and
J Nikazy, and
S J James, and
M C Schotz
November 1985,
FEBS letters,
A S Garfinkel, and
E S Kempner, and
O Ben-Zeev, and
J Nikazy, and
S J James, and
M C Schotz
January 1993,
Photosynthesis research,
A S Garfinkel, and
E S Kempner, and
O Ben-Zeev, and
J Nikazy, and
S J James, and
M C Schotz
February 1993,
FEBS letters,
A S Garfinkel, and
E S Kempner, and
O Ben-Zeev, and
J Nikazy, and
S J James, and
M C Schotz
December 1991,
The Journal of biological chemistry,
A S Garfinkel, and
E S Kempner, and
O Ben-Zeev, and
J Nikazy, and
S J James, and
M C Schotz
February 1985,
The Biochemical journal,
A S Garfinkel, and
E S Kempner, and
O Ben-Zeev, and
J Nikazy, and
S J James, and
M C Schotz
September 1987,
Plant physiology,
A S Garfinkel, and
E S Kempner, and
O Ben-Zeev, and
J Nikazy, and
S J James, and
M C Schotz
October 1984,
The Journal of biological chemistry,
A S Garfinkel, and
E S Kempner, and
O Ben-Zeev, and
J Nikazy, and
S J James, and
M C Schotz
May 1991,
FEBS letters,
A S Garfinkel, and
E S Kempner, and
O Ben-Zeev, and
J Nikazy, and
S J James, and
M C Schotz
July 1987,
Biochimica et biophysica acta,
