Molecule of the Month
September 2026

Biofilms

Bacterial communities glued together and protected by biological polymers

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PDB data help explain fundamental biology, biomedicine, bioengineering/biotechnology, and energy sciences
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Use PDB-101 resources to learn how researchers are using biology in industry
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The RCSB PDB Curricula provide authentic, hands-on teaching materials, individual and group activities and assessment suggestions
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.

Images used with permission from the Howard Hughes Medical Institute (www.hhmi.org). All rights reserved.

Crambin

Lysozyme (488)

Deoxyhemoglobin

Induced Lac Repressor

Lac Repressor

TATA-Binding Protein (TBP)

Collagen

DNA

Tomato Bushy Stunt Virus (TBSV)

Z-DNA

A-DNA

Hemoglobin (1000)

Carboxypeptidase A

Myohemerythrin

Myoglobin Fold

Aspartate Transcarbamoylase (ATCase)

Immunoglobulin G (IgG)

Trypsin

Cytochrome c

Transfer Ribonucleic Acid (tRNA)

Deoxyribonucleic Acid (DNA)

Cytochrome c (unbound)

Hemoglobin S

DPG-Hemoglobin Complex

Lysozyme (512)

Hemoglobin

Myoglobin

Oxyhemoglobin

Intermolecular Contacts in Hemoglobin S

Ribonuclease S

B-DNA

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

Excitatory and Inhibitory Synapses

Zika Virus

Lipid Droplets

Respiratory Droplet

Autophagy

Model of a Mycoplasma Cell

Escherichia coli Bacterium

Biosites: Muscle

Insulin Release

Transfer RNA and Gag Protein

Influenza Virus

Vascular Endothelial Growth Factor (VegF) Signaling

Abiogenesis

HIV-Infected Cell

Cellulose Synthase

Last Universal Common Ancestor

Myelin

Ebola Virus

Red Blood Cell Cytoskeleton

HIV Vaccine

CytoSkeleton

Insulin Action

Biosites: Cytoplasm

Kinetochore

Phage-based COVID-19 Vaccine

Biosites: Red Blood Cell

Measles Virus Proteins

Biosites: Blood Plasma

HIV in Blood Plasma

SARS-CoV-2 Fusion

Biosites: Nucleus

Blood

Caulobacter Polar Microdomain

Casein Micelle and Fat Globule in Milk

Coronavirus Life Cycle

Mycoplasma mycoides

Collagen and Extracellular Matrix

Immunological Synapse

SARS-CoV-2 and Neutralizing Antibodies

Influenza Vaccine

Biosites: Basement Membrane

JCVI-syn3A Minimal Cell

SARS-CoV-2 mRNA Vaccine

Chloroplast

RecA and DNA

Myoglobin in a Whale Muscle Cell

Escherichia coli

Poliovirus Neutralization

Bacteriophage T4 Infection

Coronavirus