Figure 1.

Alignment of the sequence repeats in rat CRT(189–288). The three 17-residue type 1 repeats are shown in yellow, and the three 14-residue type 2 repeats are white. The positions of the strands in three short antiparallel β-sheets are indicated by orange, red, and blue arrows above the sequence. The position of a helical turn, which includes a two-residue insert between the third and fourth repeat, is shown by a yellow cylinder above the sequence. Residues conserved in all three repeats of one type are underlined.