Tetrapyrroles

{
  "id": "MLC-T-CHM-013649",
  "term": "Tetrapyrroles",
  "field": "Chemistry",
  "definition": "A class of chemical compounds containing a core structure of four pyrrole rings, which are five-membered aromatic heterocycles containing one nitrogen atom. These rings are joined together either in a linear arrangement by methine bridges (=CH−) or in a cyclic structure, forming a macrocycle. Porphyrins, such as the heme group in hemoglobin, are macrocyclic tetrapyrroles, while bile pigments like bilirubin are examples of linear tetrapyrroles.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "porphyrins"
  ],
  "references": [
    "PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1371 (https://doi.org/10.1351/pac199567081307)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/tetrapyrroles/"
}