[Biopython] Additions to the SeqRecord

[Peter]

Hi all,

Over on the BioSQL mailing list, Chris Fields just made an interesting
point - there are real GenBank files with multiple source features:

Chris Fields wrote:
>
> Just to note, there are a few cases where there are two or more
> source features.  This pops up mainly with chimeric sequences,
> for example:
>
> http://www.ncbi.nlm.nih.gov/nuccore/21727885
>
> We have run into this a couple of times on the bioperl list.  In this
> case, each feature is limited to specific locations on the sequence
> and doesn't pertain to the entire sequence.  NCBI only notes the
> first source on the ORGANISM line; last time I checked, EMBL
> used both.
>
> chris

At very least, this will make an excellent example of the unit tests!

Peter