Hi Qian, The e3 just means exponent, in other words, multiply by 10**3 (thousands). It is not the units. The units are based on whatever length scale the data are in, usually angstroms, so the volume would be cubic angstroms and the area square angstroms. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco
On Sep 8, 2017, at 1:01 AM, Pu Qian <p.qian@sheffield.ac.uk> wrote:
Dear Chimera developers, I'm using Chimera to estimate molecular weight from cryo-em map through volume viewer/tools/measure volume and area/ The value of the volume I got is in e3 unit. What dies this e3 mean. This e3 unit is used for area as well, which confused me. The version I'm using is 1.12. It seems that the e3 equals nm3, but I'm not sure. It would be a great appreciated if you could help me to make it clear. Thanks Best regards Qian