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Molecule of the Month

January 2026

Natural RNA-Only Assemblies

Large and intricate naturally occurring structures composed exclusively of RNA

3D View: 9MEE

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Cartoon Spheres Surface

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Rainbow Chain Structure

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Training Resources Spotlight

Guide to Understanding PDB Data

Guided reference for methods of obtaining, exploration, and interpretation of PDB entries

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Featured:

Exploring the Workhorses of Biotechnology: Using RCSB.org to analyze plastic-degrading enzymes

Education Corner PDB & Data Archiving Curriculum

News and Events

» 01/28/2026

Impact of PDB Structures on Anti-Cancer Drug Approvals

» 01/27/2026

» 01/26/2026

January is Cervical Cancer Awareness Month

» 01/20/2026

Winter Newsletter Published

» 01/15/2026

Top Molecules of the Month in 2025

» 01/12/2026

» 01/11/2026

» 01/08/2026

PDB-101 Focus in 2026: Biotechnology

» 01/06/2026

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SciArt Galleries

Irving Geis (1908-1997) was a gifted artist who helped illuminate the field of structural biology with his iconic images. The Geis Digital Archive features many of his illustrations in the context of their molecular structures.

Aspartate Transcarbamoylase (ATCase)

Trypsin

Deoxyribonucleic Acid (DNA)

DNA

Cytochrome c

Immunoglobulin G (IgG)

Transfer Ribonucleic Acid (tRNA)

DPG-Hemoglobin Complex

Collagen

Lysozyme (512)

A-DNA

Carboxypeptidase A

Crambin

Hemoglobin

Lysozyme (488)

Tomato Bushy Stunt Virus (TBSV)

Hemoglobin S

Cytochrome c (unbound)

Oxyhemoglobin

Lac Repressor

Myoglobin

B-DNA

Myohemerythrin

Z-DNA

Hemoglobin (1000)

Ribonuclease S

Induced Lac Repressor

Myoglobin Fold

TATA-Binding Protein (TBP)

Intermolecular Contacts in Hemoglobin S

Deoxyhemoglobin

The Molecular Landscapes by David S. Goodsell integrate information from structural biology, microscopy and biophysics to simulate detailed views of the molecular structure of living cells.

Illustrations are free for use under a CC-BY-4.0 license