Selecting Atoms with Precision Using Mathematical Expressions

Molecular modelers often face a recurring challenge: selecting specific atoms out of a complex structure based on well-defined criteria such as spatial coordinates, atomic types, or custom geometrical constraints. Whether preparing a region for simulation or visualizing a portion of…

Efficiently Selecting Cameras in SAMSON Using NSL

When working on complex molecular scenes in SAMSON, camera nodes can quickly accumulate. You might create a camera for each important orientation, set up different annotation views, or manage several visualization perspectives in parallel. Over time, finding and managing the…

When (and How) to Remove Crystal Waters Before Simulation

Removing water molecules may seem like a straightforward preprocessing step before running a molecular dynamics simulation. However, when dealing with experimental structures such as those from the Protein Data Bank (PDB), some of the water molecules—especially those near the active…

Faster Molecular Modeling with Quick Groups in SAMSON

When working on molecular systems, it’s common to revisit specific parts of a structure repeatedly: a ligand, a set of residues near the active site, water molecules, binding pockets, and more. Navigating back and forth between these selections can quickly…

When Mistakes Happen: Navigating Undo and Redo in SAMSON

In molecular modeling, where precise manipulations and iterative design are crucial, accidental changes can break a workflow—or even worse, lead to unnoticed errors in a complex system. If you’ve ever altered a molecular structure and immediately regretted it, SAMSON’s history…