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.

Transfer Ribonucleic Acid (tRNA)

TATA-Binding Protein (TBP)

Myoglobin Fold

Collagen

Hemoglobin

Trypsin

DNA

Myoglobin

Lysozyme (512)

Cytochrome c

Deoxyribonucleic Acid (DNA)

Induced Lac Repressor

Immunoglobulin G (IgG)

Intermolecular Contacts in Hemoglobin S

DPG-Hemoglobin Complex

B-DNA

Aspartate Transcarbamoylase (ATCase)

Hemoglobin (1000)

Tomato Bushy Stunt Virus (TBSV)

Lac Repressor

Carboxypeptidase A

Oxyhemoglobin

Deoxyhemoglobin

Myohemerythrin

Z-DNA

Cytochrome c (unbound)

A-DNA

Ribonuclease S

Crambin

Hemoglobin S

Lysozyme (488)

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

Vascular Endothelial Growth Factor (VegF) Signaling

Casein Micelle and Fat Globule in Milk

Biosites: Red Blood Cell

Lipid Droplets

Respiratory Droplet

Caulobacter Polar Microdomain

Myelin

HIV Vaccine

Chloroplast

RecA and DNA

Biosites: Nucleus

Escherichia coli

Biosites: Blood Plasma

HIV in Blood Plasma

Coronavirus

Influenza Virus

SARS-CoV-2 and Neutralizing Antibodies

Biosites: Cytoplasm

Insulin Action

Myoglobin in a Whale Muscle Cell

Zika Virus

Phage-based COVID-19 Vaccine

Escherichia coli Bacterium

Ebola Virus

Influenza Vaccine

Autophagy

Red Blood Cell Cytoskeleton

Insulin Release

Last Universal Common Ancestor

Bacteriophage T4 Infection

Collagen and Extracellular Matrix

Measles Virus Proteins

Mycoplasma mycoides

Transfer RNA and Gag Protein

Abiogenesis

Biosites: Basement Membrane

Kinetochore

Immunological Synapse

Cellulose Synthase

Coronavirus Life Cycle

Biosites: Muscle

HIV-Infected Cell

Model of a Mycoplasma Cell

JCVI-syn3A Minimal Cell

SARS-CoV-2 mRNA Vaccine

SARS-CoV-2 Fusion

CytoSkeleton

Poliovirus Neutralization

Blood

Excitatory and Inhibitory Synapses