Creating custom index groups is a recurring need in molecular simulations with GROMACS. Whether you are working on protein-ligand complexes, membrane systems, or free energy calculations, being able to define and reuse specific atom or residue groups simplifies analysis, facilitates…

When modeling complex molecular systems, selecting exactly the right atoms, residues, or chains can get tedious. Even with powerful selection tools, the process often involves clicking through multiple menus or remembering specific selection syntaxes. This becomes especially frustrating when you…

When you’re working on a molecular movie or educational demo, it’s often useful to make certain molecules or parts of a system disappear for a few moments. Maybe you want to reveal an internal binding site, or highlight a dynamic…

One of the common challenges molecular modelers face is adapting general-purpose parameter sets to the specific needs of their systems. Whether you’re simulating a novel peptide or working with non-standard residues, modifying molecular dynamics parameters (MDP parameters) is often essential.…

Constructing carbon nanotubes manually is a common yet time-consuming task in nanoscale modeling. Molecular modelers often spend significant time aligning repeating subunits, ensuring correct bonding distances, and stacking rings into tubular shapes — and that’s before even getting to energy…

Dragging atoms to explore structural rearrangements is a common task in molecular modeling, yet it often leads to frustration when the topology inconsistencies break your simulation or generate unphysical structures. If you’ve ever attempted to manually tweak a molecular structure…

If you’ve ever worked with multiple PDB structures, you already know how tedious the data cleaning process can become. Water molecules, ions, alternate locations, missing atoms—they all add up. Multiply that by 20, 100, or even 1,000 structures, and suddenly…

Modeling carbon nanotubes (CNTs) manually can be challenging if you don’t want to rely on presets or black-box generators. You might want full control over the structure: the number of repetitions, radius, atomic alignment, or even twist between rings. But…

Whether you’re preparing a presentation for a paper, teaching structural biology, or simply clarifying a dense molecular system to collaborators, one challenge often arises: how do you remove visual clutter from complex molecular structures without completely deleting parts of your…

In molecular modeling, clarity is essential. Whether you’re preparing a presentation, building an educational video, or comparing structural conformations, the ability to highlight changes in your models can make a major difference. A frequently encountered challenge among modelers and educators…