Residue.num — PDB-style residue number

This is the number of the residue, as used in PDB. (Not available for alignment sequences.)

Note that the PDB residue number is stored as a 5-character string (not an integer). Conventionally, the first four characters are a sequence number, and an optional fifth character is the insertion code. For example, both '1' and '1A' are valid residue numbers, but a Python integer (without quotes) is not. Residue numbers longer than 5 characters will be truncated on assignment.
Example: See Residue.index command.



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