Module constants 

Constants

This module contains core data structures and functions for analyzing molecular structures.

Residue Types

The module provides functions to check residue types:

• is_amino_acid() - Check if a residue is an amino acid
• is_carbohydrate() - Check if a residue is a carbohydrate
• is_nucleotide() - Check if a residue is a nucleotide

Bond Information

Bond data from CCD includes:

• Bond lengths with standard deviations
• Canonical amino acid connectivity
• Bond order information