MMDB ASN.1 specification

Francis Ouellette francis at
Thu Dec 9 16:26:15 EST 2004

I would contact folks at NCBI (info at,
and look at what is available from the software
developer's pages (the Information Engineering
Branch (IEB)):

Hope this helps,


BF Francis Ouellette

Titus Barik wrote:
> Hi all,
> Perhaps I simply don't know what to search for, but I'm trying to find a
> specification for the Molecular Modeling Database (MMDB) format. I know
> that it's in ASN.1, but I'm curious as to if there is a document out
> there that addresses specifically the structure of the MMDB file.
> If this sounds like a naive question, it's probably because I'm not too
> familiar with how ASN.1 works as of yet. But essentially, I'd like to
> parse these files at some point and extract out specific information
> from it.
> Files from MMDB are commonly used with viewers such as Cn3D.
> Thanks,

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