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

Aspartate Transcarbamoylase (ATCase)

Oxyhemoglobin

Deoxyhemoglobin

Transfer Ribonucleic Acid (tRNA)

Lysozyme (488)

Trypsin

Deoxyribonucleic Acid (DNA)

A-DNA

Intermolecular Contacts in Hemoglobin S

Myoglobin Fold

Hemoglobin (1000)

Cytochrome c (unbound)

Myohemerythrin

Collagen

DNA

Immunoglobulin G (IgG)

Carboxypeptidase A

Tomato Bushy Stunt Virus (TBSV)

TATA-Binding Protein (TBP)

B-DNA

Hemoglobin S

DPG-Hemoglobin Complex

Hemoglobin

Myoglobin

Lac Repressor

Z-DNA

Lysozyme (512)

Induced Lac Repressor

Cytochrome c

Ribonuclease S

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

Coronavirus

Insulin Action

Excitatory and Inhibitory Synapses

Escherichia coli Bacterium

Last Universal Common Ancestor

Blood

Bacteriophage T4 Infection

Influenza Vaccine

Measles Virus Proteins

Mycoplasma mycoides

Biosites: Basement Membrane

Red Blood Cell Cytoskeleton

SARS-CoV-2 mRNA Vaccine

Influenza Virus

HIV-Infected Cell

Abiogenesis

Biosites: Red Blood Cell

Casein Micelle and Fat Globule in Milk

CytoSkeleton

SARS-CoV-2 and Neutralizing Antibodies

Biosites: Blood Plasma

Ebola Virus

Model of a Mycoplasma Cell

HIV in Blood Plasma

Poliovirus Neutralization

Autophagy

Coronavirus Life Cycle

Phage-based COVID-19 Vaccine

Chloroplast

Biosites: Cytoplasm

Zika Virus

Myoglobin in a Whale Muscle Cell

Vascular Endothelial Growth Factor (VegF) Signaling

SARS-CoV-2 Fusion

HIV Vaccine

Myelin

JCVI-syn3A Minimal Cell

Kinetochore

Transfer RNA and Gag Protein

Caulobacter Polar Microdomain

Respiratory Droplet

RecA and DNA

Biosites: Nucleus

Cellulose Synthase

Collagen and Extracellular Matrix

Lipid Droplets

Immunological Synapse

Escherichia coli

Biosites: Muscle

Insulin Release