Table I.

Analysis of the pea HSP21 complex by size-exclusion chromatography

Sample	Salt Concentrationa	Apparent Molecular Massb
		kD
Chloroplast lysate	150 mm NaCl	420
40% (NH4)2SO4 supernatant	150 mm KCl	300
Purified complex	150 mm NaCl or 150 mm KCl	310
Purified complex	500 mm (NH4)2SO4	340

^aConcentration and salt used during size-exclusion chromatography with the Sephadex G-200 matrix. 

^bEstimated molecular masses are ± 12.5%, as described in Methods.