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. Author manuscript; available in PMC: 2017 Feb 11.
Published in final edited form as: Toxicon. 2015 Jan 7;95:72–83. doi: 10.1016/j.toxicon.2015.01.003

Fig. 2.

Fig. 2

Measurement of the quantity of ricin and RCA in individual cultivars in mg/g of seed as determined by isotope dilution mass spectrometry. Dark gray denotes quantity of ricin calculated from the mean of the A-chain peptides VGLPINQR and LTTGADVR, light gray denotes quantity of RCA calculated from the mean of the A-chain peptides VGLPISQR and SHLTTGGDVR. The y-axis is the quantity of ricin or RCA in mg/g seed. Asterisk denotes small seed cultivars. Each value represents the mean of three replicates; error bars show one standard deviation from the mean.