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Crystallization of trimeric recombinant human tumor necrosis factor (cachectin)
1988
Journal of Biological Chemistry
Crystals of tumor necrosis factor (TNF) have been obtained in two forms. Rhombohedral crystals grow in 1.8 to 2.0 M ammonium sulfite, pH 7.8 at 21 degrees C, and tetragonal crystals grow in 2.6 M magnesium sulfate, pH 5.5 at 25 degrees C. Analysis of TNF by isoelectric focusing under native and denaturing conditions indicates that TNF molecules exist as trimers in solution. The rhombohedral cachectin crystals belong to space group R3 and have unit cell constants a = b = c = 47.65 A and alpha =
pmid:3417634
fatcat:obm4a6obazdb5lmlvhrx3trak4