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Avoiding Common Pitfalls in Molecular Simulations with Constrained Animations

One of the most frustrating issues for molecular modelers is running a simulation only to realize afterward that the initial positions of atoms weren’t quite right. The result? Drifting atoms, broken structures, or failed mechanical behavior. If you’ve ever tried…

Clarify your scenes: Filtering presentation nodes by visibility in SAMSON

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Working with complex molecular models often means dealing with countless nodes representing atoms, residues, structures, and their various visual representations. When presentation gets overwhelming, focusing only on visible content can dramatically enhance your workflow. That’s where SAMSON’s Node Specification Language…

Preventing Common Pitfalls When Defining Boxes for Pulling Simulations

OneAngstrom

In molecular dynamics simulations, especially when performing setups such as center-of-mass pulling, one common source of frustration can originate from the simulation box definition. Many users—especially those new to extended systems or periodic boundary conditions—face issues like artificial interactions due…

Quickly Hiding and Showing Labels in SAMSON with NSL

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Efficient molecular modeling often depends on clarity and focus — especially when working on complex systems packed with annotations and visual markers. In SAMSON, molecular modelers frequently use labels to track properties, monitor molecular dynamics, or assist in group-based selections.…

Seeing Molecules in 3D: A Guide to Ambient Occlusion in SAMSON

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One of the common frustrations in molecular modeling is the difficulty of understanding the 3D structure of large biomolecules on a 2D screen. Structures can appear flat or confusing, and subtle spatial relationships might get lost, especially when visualizing complex…

Cleaning Hundreds of Protein Files Doesn’t Have to Be Painful

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If you’ve ever worked with protein structure files downloaded from the Protein Data Bank (PDB), you’ve probably experienced one or more of the following: Manually opening and cleaning each PDB file, one at a time Writing custom scripts to remove…

How to Create Custom Index Groups in GROMACS Using SAMSON

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When setting up GROMACS simulations, many molecular modelers reach a point where they need to define custom index groups — for example, to monitor specific residues, apply restraints, or use them as pulling groups during simulations. While gmx make_ndx is…

From Monomers to Meaningful Chains: Defining Polymer Sequences in SAMSON

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One common challenge molecular modelers face when building polymers is controlling the exact sequence of monomers. Whether you’re designing a repeating synthetic chain or trying to mimic the behavior of a biopolymer, sequence matters. And yet, defining and managing specific…

How to Keep Track of GROMACS Jobs While Using SAMSON

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One of the most common frustrations for molecular modelers running energy minimization or molecular dynamics simulations is losing control over job progress. Long computations can leave users wondering whether the job is still running, if it has completed successfully, or…

Stop Digging Through Atoms Manually: Use NSL to Filter Nodes in SAMSON’s Document View

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When working with complex molecular systems in SAMSON, one common pain point is sifting through countless nodes (atoms, residues, structural groups, etc.) in the Document view just to find what you need. Whether you’re inspecting a specific residue type, cleaning…