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  Dear Ed,

no, if you start with model that has no hydrogens, they will not be 
generated internally.

Pavel.

On 9/15/10 2:58 PM, Ed Pozharski wrote:
> Sure.  But if I start with model that has no hydrogens, they will be
> generated but not passed to the output, right.  just like refmac.
>
> On Wed, 2010-09-15 at 14:52 -0700, Pavel Afonine wrote:
>> Dear Ed,
>>
>> On 9/15/10 2:47 PM, Ed Pozharski wrote:
>>> On Wed, 2010-09-15 at 16:26 -0400, Phil Jeffrey wrote:
>>>> So the riding hydrogen model is imperfect.  At least with
>>>> phenix.refine
>>>> you can measure it, unlike the default behavior of REFMAC.  (But you
>>>> can
>>>> tell it to write hydrogens out, I believe).
>>>>
>>> My impression is that default behavior of phenix.refine is the same - I
>>> had to change parameters to include hydrogens in the output.
>> No, if your input file contains H atoms, the output file will contain
>> them too (in phenix.refine). You don't have to change any parameters for
>> this.
>>
>> Pavel.
>>