Hi Joseph,
It is a very beautiful crystal with neat diffraction patterns and
background, which may suggest a good cryoprotection. Here is my observation
from your images.
1. From your image taken at 30 degrees (first page), I believe it is a
protein crystal with a larger unit cell length on one
The first is a very interesting pattern! - It would be good to know more about
exactly how the patterns were taken, camera length and dimensions to determine
the spacings. - The first patterns look very strongly like Bessel functions of
a helical diffraction pattern that is then sampled by a
to recall the subject of PEG crystals coming up before.
Colin
-Original Message-
From: CCP4 bulletin board On Behalf Of Joseph Ho
Sent: 08 December 2020 15:47
To: CCP4BB@JISCMAIL.AC.UK
Subject: [ccp4bb] seek your opion on this weird diffractio pattern
Dear all:
We recently worked on 8kDa
Hello, the first of those diffraction patterns is very beautiful. What was the
concentration of zinc acetate? Also, did you keep the crystal? It might be
worth prodding it with a needle and if holds together well or if you hear a
loud crack it's probably salt. The second image shows a salt-like
