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Title: A ribbon representation of a protein domain Post by: minjai0322 on Sep 28, 2010 Shown below is a ribbon representation of a protein domain. Name the recognizable secondary structures a, b, (c & d). Are c and d parallel or antiparallel?
Title: Re: A ribbon representation of a protein domain Post by: bio_man on Sep 28, 2010 Welcome.
A and B (alpha helix) C and D (beta-pleated sheets) Typically parallel beta sheets are large structures that usually consist of at least five strands. Therefore, I would have to say they are anti-parallel. In antiparallel beta sheets, the beta strands run in the opposite direction. Anti-parallel beta sheets can consist of as few as two strands. What are your thoughts? |