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Free and esterified sterols in leaves (A and B) and tubers (C and D) from wild-type and transgenic GmSMT1 potato plants. Sterols were extracted from leaves and tubers and analyzed in duplicate by gas chromatography confirmed with mass spectrometry. White staples, Wild type; black staples, transgenic clones, from left to right clones 118 and 217. Mean values + sd, n = 3 plants. ND, Not detected.
