I got an email from a reader of ChemKnits who suffers from Acute Intermittent Porphyria, and wanted my help making a molecule chart for the molecule that accumulates in this genetic disorder, Porphobilinogen (a chemical precursor to heme). This blog post will provide you with a chart of Porphobilinogen and some charts based on the heme structure.

The pattern link contains (1) Porphobilinogen chart and (3) Heme inspired charts