Molecule of the Month
September 2026

Biofilms

Bacterial communities glued together and protected by biological polymers

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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.

Collagen

Deoxyhemoglobin

Immunoglobulin G (IgG)

A-DNA

Z-DNA

Myoglobin Fold

Crambin

Oxyhemoglobin

Tomato Bushy Stunt Virus (TBSV)

Trypsin

DPG-Hemoglobin Complex

Lysozyme (488)

Aspartate Transcarbamoylase (ATCase)

DNA

Hemoglobin S

B-DNA

Cytochrome c (unbound)

Intermolecular Contacts in Hemoglobin S

Cytochrome c

Ribonuclease S

Deoxyribonucleic Acid (DNA)

Lysozyme (512)

Hemoglobin

Induced Lac Repressor

Lac Repressor

Myohemerythrin

Transfer Ribonucleic Acid (tRNA)

Myoglobin

Carboxypeptidase A

Hemoglobin (1000)

TATA-Binding Protein (TBP)

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

Casein Micelle and Fat Globule in Milk

Biosites: Muscle

Zika Virus

Collagen and Extracellular Matrix

Influenza Virus

Abiogenesis

Biosites: Basement Membrane

HIV-Infected Cell

Caulobacter Polar Microdomain

Last Universal Common Ancestor

SARS-CoV-2 mRNA Vaccine

Respiratory Droplet

Biosites: Cytoplasm

Influenza Vaccine

Kinetochore

Escherichia coli Bacterium

Measles Virus Proteins

Insulin Action

JCVI-syn3A Minimal Cell

Chloroplast

Model of a Mycoplasma Cell

Red Blood Cell Cytoskeleton

Biosites: Nucleus

Myelin

Coronavirus Life Cycle

Ebola Virus

Biosites: Red Blood Cell

Biosites: Blood Plasma

Blood

RecA and DNA

Immunological Synapse

Insulin Release

Phage-based COVID-19 Vaccine

Bacteriophage T4 Infection

CytoSkeleton

Lipid Droplets

Excitatory and Inhibitory Synapses

HIV Vaccine

SARS-CoV-2 Fusion

Poliovirus Neutralization

Transfer RNA and Gag Protein

Vascular Endothelial Growth Factor (VegF) Signaling

HIV in Blood Plasma

Coronavirus

Mycoplasma mycoides

Myoglobin in a Whale Muscle Cell

Autophagy

Escherichia coli

SARS-CoV-2 and Neutralizing Antibodies

Cellulose Synthase