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.

Oxyhemoglobin

Immunoglobulin G (IgG)

Carboxypeptidase A

Ribonuclease S

Deoxyhemoglobin

DNA

Hemoglobin S

Trypsin

Aspartate Transcarbamoylase (ATCase)

Hemoglobin (1000)

Transfer Ribonucleic Acid (tRNA)

Cytochrome c

Collagen

Cytochrome c (unbound)

Intermolecular Contacts in Hemoglobin S

Z-DNA

Crambin

Myohemerythrin

Induced Lac Repressor

Myoglobin Fold

Lysozyme (488)

Myoglobin

Lysozyme (512)

Lac Repressor

B-DNA

TATA-Binding Protein (TBP)

Hemoglobin

Tomato Bushy Stunt Virus (TBSV)

A-DNA

Deoxyribonucleic Acid (DNA)

DPG-Hemoglobin Complex

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

Myoglobin in a Whale Muscle Cell

HIV Vaccine

Transfer RNA and Gag Protein

Phage-based COVID-19 Vaccine

Last Universal Common Ancestor

Biosites: Cytoplasm

Coronavirus

Biosites: Blood Plasma

HIV-Infected Cell

Red Blood Cell Cytoskeleton

CytoSkeleton

Influenza Vaccine

Autophagy

Biosites: Red Blood Cell

Zika Virus

Escherichia coli

Model of a Mycoplasma Cell

Escherichia coli Bacterium

Insulin Action

Lipid Droplets

Biosites: Basement Membrane

Poliovirus Neutralization

SARS-CoV-2 Fusion

Blood

Measles Virus Proteins

Chloroplast

Casein Micelle and Fat Globule in Milk

Biosites: Nucleus

Respiratory Droplet

Excitatory and Inhibitory Synapses

SARS-CoV-2 mRNA Vaccine

Immunological Synapse

Mycoplasma mycoides

Abiogenesis

SARS-CoV-2 and Neutralizing Antibodies

HIV in Blood Plasma

Influenza Virus

Collagen and Extracellular Matrix

Vascular Endothelial Growth Factor (VegF) Signaling

Ebola Virus

Myelin

RecA and DNA

Insulin Release

Kinetochore

Cellulose Synthase

Biosites: Muscle

JCVI-syn3A Minimal Cell

Bacteriophage T4 Infection

Coronavirus Life Cycle

Caulobacter Polar Microdomain