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A. thaliana stem extract derivatized with FMOC-Cl. The pattern of elution is identical to the flower bud extract (Figure 2). The large unmarked peak is an derivatization artifact. Put, putrescine; spd, spermidine; spm, spermine. Thermospermine most likely elutes as a left shoulder of spermidine. Notice the different scale compared to Figure 2.
