Biology — Levels of Protein Structure

Primary through quaternary protein structure.

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digraph Protein {
  rankdir=LR;
  node [shape=box, style=rounded];
  "Primary (sequence)" -> "Secondary (helix / sheet)";
  "Secondary (helix / sheet)" -> "Tertiary (3D fold)";
  "Tertiary (3D fold)" -> "Quaternary (subunits)";
}