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Several of the TM helices of the PIN family have periodicity; TM2, TM6, TM8 and TM10 only are shown for clarity. TM5 and TM7 show no periodicity. In each case the sequence of A. thaliana PIN1 is shown projected on to a helical wheel, with the first amino acid against a pale blue background. Arrow styles are as described in Figure 3.
