title: Beta solenoid
text: # Beta solenoid
  
  A beta solenoid is a protein fold composed of repeating beta strands subunits, arranged in antiparallel fashion to form a superhelix.
  
  ## Terminology and classification
  
  Beta solenoids are part of the solenoid class of protein tandem repeats.
  
  ## Structure
  
  Beta solenoids are elongated and potentially open-ended protein repeats characterized by beta strands winding around an imaginary axis, where the beta sheets are formed by sequences of consecutive repeat units.
  
  