C' Ser and Thr capping of α
turns. Ser and Thr mediated C' hydrogen bonds. αL-turn carbons are colored orange and the flanking residues are green. Sidechain atoms are shown for the capping residues only. Ser structures shown: 2FFU_A 525-529, 1ZY7_A 340-344 and 1MD6_A 61-65. Thr structures shown: 1UYL_A 107-111,1HYO_A 368-372 and 1GSA_A 190-194.