Twenty fragments,
one protein
Join the twenty epitopes from Part I and you get a single 419-residue protein. This part covers only that joining: what holds the pieces together, what else gets attached, and what shape the result takes.
The paper gives the construct's sequence only as a figure, so we rebuild it ourselves. Three numbers prove the rebuild is right โ length 419, mass 44.37 kDa, isoelectric point 9.56, all matching the paper to the last digit.
With that ruler in hand you can catch the 42 residues missing from the text, and the epitope that is one residue short, for yourself.
Python runs right inside this page. There is nothing to install.
How you'll learn
The paper gives the sequence only as a figure. You rebuild it by hand; hitting 419 means you got it right.
Length, mass, isoelectric point. Each measures something different, so when all three agree little room is left for error.
The 42 missing residues and the epitope that is one residue short both show up in the numbers first.
Half-life, solubility, Ramachandran, MolProbity โ each measures less than you would expect.