In our database we recorded the length (in amino acids) of the protein
in which a certain sheet is found, or the domain size (also in amino
acids) if a protein has more than one domain. Please enter the
smallest number of amino acids you are interested in into the left
field, and the largest number of amino acids you are interested in
into the right field. The defaults are 0 and 1500 respectively, which
spans all protein lengths.