The first repeat of β-catenin (near the N-terminus) is slightly different from the others – as it has an elongated helix with a kink, formed by the fusion of helices 1 and 2.
A primeira repetición da β-catenina (preto do N-terminal) é lixeiramente diferente das outras, xa que ten unha hélice alongada cunha retorcedura, formada pola fusión das hélices 1 e 2.