[ccp4bb] cryoprotection condition

[rana ibd]

Dear CCP4
Does anyone know a good cryoprotection condition for these two conditions I 
would be grateful
The first condition:
 10% PEG 20000, 20%PEG MME 550. 0.03M of NPS ( NPS is sodium nitrate, disodium 
hydrogen phosphate, and ammonium sulfate), 0.1MMES/Imadizole pH 6.5
The second condition:
20% PEG 3350, 0.2M sodium iodide or 0.2M sodium acetate
Thank you
Rana