Molecule of the Month
September 2026

Biofilms

Bacterial communities glued together and protected by biological polymers

More

3D View:  4P00

Style

Color

Spin

Learn
PDB data help explain fundamental biology, biomedicine, bioengineering/biotechnology, and energy sciences
Feature Focus
Use PDB-101 resources to learn how researchers are using biology in industry
Teach
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.

Myoglobin

Oxyhemoglobin

Deoxyhemoglobin

Lysozyme (488)

Intermolecular Contacts in Hemoglobin S

TATA-Binding Protein (TBP)

B-DNA

Z-DNA

Induced Lac Repressor

Carboxypeptidase A

Immunoglobulin G (IgG)

Aspartate Transcarbamoylase (ATCase)

Hemoglobin S

Cytochrome c (unbound)

Crambin

Deoxyribonucleic Acid (DNA)

Myoglobin Fold

Lac Repressor

A-DNA

Trypsin

Lysozyme (512)

Ribonuclease S

DNA

Tomato Bushy Stunt Virus (TBSV)

Cytochrome c

Hemoglobin

Transfer Ribonucleic Acid (tRNA)

DPG-Hemoglobin Complex

Hemoglobin (1000)

Myohemerythrin

Collagen

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

Model of a Mycoplasma Cell

Casein Micelle and Fat Globule in Milk

CytoSkeleton

Biosites: Basement Membrane

Collagen and Extracellular Matrix

Ebola Virus

Insulin Release

SARS-CoV-2 and Neutralizing Antibodies

Biosites: Blood Plasma

HIV in Blood Plasma

Biosites: Muscle

JCVI-syn3A Minimal Cell

Myelin

Excitatory and Inhibitory Synapses

SARS-CoV-2 mRNA Vaccine

Abiogenesis

Immunological Synapse

Autophagy

Last Universal Common Ancestor

Coronavirus Life Cycle

Respiratory Droplet

Biosites: Nucleus

Escherichia coli

Red Blood Cell Cytoskeleton

Cellulose Synthase

Zika Virus

Phage-based COVID-19 Vaccine

Myoglobin in a Whale Muscle Cell

Measles Virus Proteins

SARS-CoV-2 Fusion

Poliovirus Neutralization

Biosites: Cytoplasm

Insulin Action

Chloroplast

HIV Vaccine

Blood

Kinetochore

Influenza Virus

Mycoplasma mycoides

Influenza Vaccine

HIV-Infected Cell

RecA and DNA

Lipid Droplets

Escherichia coli Bacterium

Coronavirus

Transfer RNA and Gag Protein

Caulobacter Polar Microdomain

Vascular Endothelial Growth Factor (VegF) Signaling

Bacteriophage T4 Infection

Biosites: Red Blood Cell