Molecule of the Month
October 2026

Celebrating 55 Years of the PDB

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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 Fold

Myohemerythrin

Cytochrome c

Tomato Bushy Stunt Virus (TBSV)

Trypsin

B-DNA

Z-DNA

Carboxypeptidase A

Deoxyribonucleic Acid (DNA)

Hemoglobin

Ribonuclease S

Crambin

Hemoglobin (1000)

Oxyhemoglobin

Transfer Ribonucleic Acid (tRNA)

Immunoglobulin G (IgG)

TATA-Binding Protein (TBP)

Collagen

Lysozyme (512)

Myoglobin

Hemoglobin S

Aspartate Transcarbamoylase (ATCase)

Lysozyme (488)

A-DNA

Intermolecular Contacts in Hemoglobin S

Deoxyhemoglobin

Cytochrome c (unbound)

DPG-Hemoglobin Complex

Lac Repressor

Induced Lac Repressor

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

Biosites: Basement Membrane

HIV Vaccine

Model of a Mycoplasma Cell

Biosites: Red Blood Cell

Abiogenesis

Respiratory Droplet

Insulin Action

SARS-CoV-2 Fusion

Vascular Endothelial Growth Factor (VegF) Signaling

Myelin

HIV in Blood Plasma

Biosites: Muscle

Autophagy

Ebola Virus

SARS-CoV-2 and Neutralizing Antibodies

Lipid Droplets

Zika Virus

Insulin Release

Bacteriophage T4 Infection

Poliovirus Neutralization

Escherichia coli

Kinetochore

CytoSkeleton

HIV-Infected Cell

Measles Virus Proteins

Casein Micelle and Fat Globule in Milk

Cellulose Synthase

SARS-CoV-2 mRNA Vaccine

Influenza Vaccine

Biosites: Nucleus

Chloroplast

Excitatory and Inhibitory Synapses

Immunological Synapse

Last Universal Common Ancestor

Mycoplasma mycoides

JCVI-syn3A Minimal Cell

Biosites: Cytoplasm

Biosites: Blood Plasma

Myoglobin in a Whale Muscle Cell

Escherichia coli Bacterium

Influenza Virus

Phage-based COVID-19 Vaccine

Collagen and Extracellular Matrix

Red Blood Cell Cytoskeleton

RecA and DNA

Blood

Coronavirus

Caulobacter Polar Microdomain

Coronavirus Life Cycle

Transfer RNA and Gag Protein