Thanks Tim, Phil and Andrew for your answers.

Just one further related question:

Why is it that mosflm seems to report higher completeness than XDS on the same data (I've seen this on about 50 datasets)? I always thought it was due to mosflms peak extrapolation but it seems this isn't the answer if SCALA throws those reflections out.

Thanks,

Simon

On 7 Jun 2010, at 15:35, Phil Evans wrote:

Mosflm integrates them (profile-fitted overloads) but flags them. Pointless uses them for systematic absence tests. Scala by default ignores them, but you can include them if you want: this is not normally recommended since they are pretty inaccurate (look in the "Excluded data" tab of ccp4i/Scala)

If you are merging strong & weak datasets it should do the right thing, I think.

Phil


On 7 Jun 2010, at 15:09, Simon Kolstoe wrote:

Dear CCP4bb,

I was wondering if someone could tell me how mosflm and scala deal with overloaded reflections. From my understanding mosflm extrapolates the overloaded peaks but then scala throws them out completely - is this right?

If so am I right to not worry about "contamination" from extrapolated peaks when combining high and low resolution datasets from the same crystal?

Thanks

Simon

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