蓖麻毒素A链 来源于蓖麻 （蓖麻子）

Ricin A chain inactivates the 60 S ribosomal subunit of eukaryotic cells, inhibiting protein synthesis. This toxic activity is independent of the presence of the B chain of ricin.

Solution in 40% glycerol containing 10 mM phosphate, pH 6.0, 0.15 M NaCl, 10 mM galactose and 0.5 mM dithioerythritol

Purified by affinity chromatography.

Agglutination activity is expressed in μg/ml and is determined from serial dilutions in phosphate buffered saline, pH 7.2, of a 1 mg/ml solution. This activity is the lowest concentration to agglutinate a 2% suspension of human erythrocytes after 1 hour incubation at 25°C.

Electrophoretically pure (SDS-PAGE)

Ricinus communis toxin (also named RCA₆₀, RCA_II, Ricin D, or RCL III) is a highly toxic protein, mol. wt. ~60 kDa, composed of two chains, A and B, connected by a single disulfide bridge.