[BioPython] seq objects etc...

[Bradley Marshall]

> The thing is, it doesn't make much of a difference. 
> The basic
> classes don't have to be the ones given by the LSR;
> you just need
> a way to construct them from what you have.

Cool.
 
> Thus, we could have a light-weight sequence object
> and use it to
> compose something which meets the LSR requirements.

How is that done?

> And BTW, I'm more in favor of even lighter weight
> objects than
> Ewan; that is, I would rather not have id, accession
> and desc as
> part of the core object.  To me that is more related
> to a sequence
> record data type.

How do we identify the sequences without some form of ID?  Do you make
a sequence record which has-a sequence?
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