API Amino Acid

get_1_letter_code_from_name(name)	Return the one-letter IUPAC code for an amino acid given its three-letter or variant name.
get_bonded_atom_pairs(group_name, atom_names)	Getting standard intra-group covalent bonded atom pairs for amino acid residues.
get_expected_heavy_atoms(group_name[, ...])	Return the set of expected heavy (non-hydrogen) atom names for a residue.
get_expected_hydrogens(group_name[, ...])	Return the list of expected hydrogen atom names for a residue.
get_group_db(group_name)	Getting the internal reference database dictionary for amino acid groups.
get_standard_name(group_name)	Return the canonical standard amino-acid name for a non-standard residue.
is_amino_acid(name)	Check whether a group name corresponds to an amino acid residue.