The propensity calculations show that some amino acids such as Glu, Ser and Thr have statistically significant higher preferences to occur in alpha-turns than in alpha-helices, In addition to the 5 --> 1 type, the residues in the alpha-turn are involved in hydrogen bonds with other parts of the chain, The residues are in general more hydrophilic compared to those in alpha-helices, In many cases (7