Fix missing residue issue

src/ribbon/render.jl

@@ -41,7 +41,7 @@ function draw_lines_between_subchains!(
 )
     subchains = [chain[r] for r in subchain_ranges]
     for (i, j) in zip(1:length(subchains)-1, 2:length(subchains))
-        startpoint, endpoint = subchains[i].backbone[end], subchains[j].backbone[begin]
+        startpoint, endpoint = subchains[i].backbone[end-1], subchains[j].backbone[begin+1]
         n_segments = trunc(Int, norm(endpoint - startpoint) / 0.8)
         xs, ys, zs = [LinRange(startpoint[i], endpoint[i], 2*n_segments) for i in 1:3]
         linesegments!(ribbon, xs, ys, zs; linewidth=linewidth, color=color, transparency=true)