Dear Smith F is some structure factor amplitude, probably half of a map coefficient. Fobs is presumably related to some intensity observation. Important point though: you can name the columns in an MTZ *whatever you like* i.e. F1, F2, F_Hg, … so beyond some conventions adopted by CCP4 programs there are no limitations on the names.
It would be very helpful to annotate your question with F *from ??* Fobs *from truncate?* Fobs_cmpl *from whatever* so the people on the list can give you a more helpful answer. Sorry I could not be more helpful – MTZ is useful because it is *flexible* Best wishes Graeme From: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] On Behalf Of Smith Lee Sent: 17 November 2015 08:05 To: ccp4bb Subject: [ccp4bb] on mtz labels Dear All, Will you please tell me the difference among label F, Fobs and Fobs_cmpl for the mtz file format？ I get confused. Best regards. Smith -- This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail. Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd. Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message. Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom
