Exploratory Data Analysis

(1) USe MSA profile vector frequencies instead of counts for the
histograms and Hiton plots.

(2) Check updated PDB and UniprotKB entries
     1E54.E, 3A2S.G, 3PRN.C, 2POR.C --> have these chains been removed?
(3) Hydrophobic Moment
    --> link to OMP boundaries and use as a potential signal indicator