Dear Markus,
I have seen something similar before, I think it was only one cell dimension that was changing (and not the lattice type), but it could double or triple the cell edge, crystals grown in very similar conditions, impossible to tell from morphology what the cell would be, so such things can happen.
Cheers,
Andrew
> On 9 Nov 2017, at 10:02, Markus Heckmann <[log in to unmask]> wrote:
>
> Dear all,
>> From a small protein, gives crystals P2 with cell
> Cell 53.16 65.73 72.89 90 110.94 90
> (has 3 molecules in the asymmetric unit). Tested with pointless. Does
> not give any other possibility.
>
> Another crystal if the same protein, similar conditions:
> C2
> Cell 109.14 124.37 73.42 90 111.75 90. This has 6
> molecules in the a.s.u. Tested with pointless. Does not give any other
> possibility.
> The cell length a, b of C2 is twice that of P2.
>
> Is it usual to get such crystals from similar conditions or am I
> missing something?
>
> Many thanks,
> Mark
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