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Immunolocalization of UGT72AZ1, UGT72AZ2, and UGT72A2 in transversal sections of 3-month-old WT poplar grown in the greenhouse. (a) UGT72AZ1 in the stem at 20 cm below the apex. (b) UGT72AZ2 in the root. (c) UGT72A2 in the stem at 10 cm below the apex. (d) Negative control in stem (no primary antibody). Alexa 488 signal corresponding to the UGT72 epitope is shown in green. Lignin autofluorescence is in blue. e, epidermis; p, phloem; pf, phloem fiber; x, xylem. Scale = 100 µm.
