"mol_chains:" = mol_chain[[,mol_chain]]:
mol_chain is the name of a molecule, if a single chain molecule, otherwise it is the name of one of the chains of a multi-chain molecule.
mol_chain consists of 1-8 characters from the set "A-Z", "0-9", and "_", except that the first character must not be a "_". The punctuation mark ":" is a required terminator for the mol_chains: field.
The wildcard characters "*" (matches any character string) and "%" (matches a single character) are currently supported.
mol_chains: Description*: all molecules known to the \fBPSL\fP mol1: molecule named "mol1" mol1,mol2: molecules "mol1" and "mol2" mol*: all molecules with the name prefix "mol" mol%: all molecules with 4-char names beginning with "mol"