Erythro structures

{
  "id": "MLC-T-CHM-004090",
  "term": "Erythro structures",
  "field": "Chemistry",
  "definition": "A stereochemical descriptor used to denote the relative configuration of two adjacent chiral centers in an open-chain molecule, where identical or similar substituents on the main chain are on the same side when viewed in a Fischer projection. This contrasts with threo structures, where these substituents are on opposite sides. The terms are derived from the configurations of erythrose and threose.",
  "subject": "Polymer",
  "see_also": [
    "sequence",
    "erythro, threo",
    "relative configuration"
  ],
  "references": [
    "Purple Book, 1st ed., p. 36 (http://old.iupac.org/publications/books/author/metanomski.html)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/erythro-structures/"
}