difference density map造句

例句与造句

1. It is often used as a ligand in protein crystallography to prevent proteases from degrading a protein of interest; the triangular diamine group at the bottom gives it a very obvious'stick-man'shape which shows up in difference density maps.
2. Difference density maps are usually calculated using Fourier coefficients which are the differences between the observed structure factor amplitudes from the X-ray diffraction experiment and the calculated structure factor amplitudes from the current model, using the phase from the model for both terms ( since no phases are available for the observed data ).
3. It's difficult to find difference density map in a sentence. 用difference density map造句挺难的