Dear All, I'm trying to generate a mask from a pdb coordinate file using the 'Ncsmask' utility of CCP4 (Map & Mask Utilities => Create/Edit Masks). The parameters I used are: ========================================= Radius for building mask from atoms 10.0 angstrom. Space group P1 Set map extent x 0.0 307.2, y 0.0 307.2, z 0.0 307.2 Set map grid x=128 y=128 z=128
Cleanup mask to have 1 contiguous region Trim maks to minimum box ========================================= I want to have a mask with pixel size of 307.2/128 =2.4, and box size of 128. But the mask I got has a pixel size of 1 A/pixel, and box size of 308. Is there anything wrong with my parameters? It seems that the mask generated by Ncsmask always has a pixel size of 1. Thanks in advance! Steven
