>> Q: Jan, can you find me an entry with FORMUL records that include a
>> continuation onto a second line? If it is not easy to do then do not do
>
> I found 5039 different ligands/hetgroups in the latest release of PDB
> and none seems to have a two lines FORMUL record.

Very good.

The file format specification says that a FORMUL can be continued onto a
second line. There is currently no support for this in the Jmol PdbReader.


> The longests FORMUL have eight 'components':
>
>  FORMUL      CUB    C5 H9 N1 O2 S1 CU1 MO1 4+      PDB id 1N62
>  FORMUL      FTP    C12 H13 N4 O4 F3 P1 S1 1-      PDB id 1G4T
>  FORMUL      PTE    C20 H29 N10 O14 MG1 P2 S4 W1   PDB id 1AOR, 1B4N
>  FORMUL      PTT    C21 H23 N10 O13 MG1 P2 S4 W1   PDB id 1B25
>
> You may take a look to the groups at
>
>   http://bip.weizmann.ac.il/oca-bin/send-het?FTP
>   http://bip.weizmann.ac.il/oca-bin/send-het?PTE
>   http://bip.weizmann.ac.il/oca-bin/send-het?PTT
>
> BTW, the FORMUL record is present in about 86.7 % of the PDB entries,
> as reported by pdbRecNames (http://bip.weizmann.ac.il/oca-bin/pdbRecNames)

That is a useful statistic to have.


Miguel



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