Molecule of the Month
September 2026

Biofilms

Bacterial communities glued together and protected by biological polymers

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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.

Lac Repressor

Cytochrome c (unbound)

DPG-Hemoglobin Complex

Transfer Ribonucleic Acid (tRNA)

Deoxyhemoglobin

Myoglobin

Crambin

TATA-Binding Protein (TBP)

Hemoglobin S

Trypsin

Lysozyme (512)

Hemoglobin (1000)

Myohemerythrin

Lysozyme (488)

Aspartate Transcarbamoylase (ATCase)

Deoxyribonucleic Acid (DNA)

A-DNA

Hemoglobin

Carboxypeptidase A

Immunoglobulin G (IgG)

DNA

Oxyhemoglobin

Myoglobin Fold

Ribonuclease S

Collagen

B-DNA

Z-DNA

Induced Lac Repressor

Cytochrome c

Intermolecular Contacts in Hemoglobin S

Tomato Bushy Stunt Virus (TBSV)

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

Lipid Droplets

Coronavirus

Ebola Virus

Collagen and Extracellular Matrix

JCVI-syn3A Minimal Cell

Escherichia coli Bacterium

SARS-CoV-2 mRNA Vaccine

Coronavirus Life Cycle

Chloroplast

SARS-CoV-2 Fusion

Zika Virus

Model of a Mycoplasma Cell

Red Blood Cell Cytoskeleton

Biosites: Red Blood Cell

Last Universal Common Ancestor

Blood

Respiratory Droplet

Mycoplasma mycoides

CytoSkeleton

SARS-CoV-2 and Neutralizing Antibodies

Biosites: Cytoplasm

Abiogenesis

HIV-Infected Cell

Casein Micelle and Fat Globule in Milk

Autophagy

Influenza Virus

Insulin Release

Poliovirus Neutralization

Insulin Action

Cellulose Synthase

Biosites: Nucleus

Excitatory and Inhibitory Synapses

Transfer RNA and Gag Protein

Biosites: Muscle

HIV Vaccine

Phage-based COVID-19 Vaccine

Escherichia coli

Measles Virus Proteins

HIV in Blood Plasma

Immunological Synapse

Myoglobin in a Whale Muscle Cell

Caulobacter Polar Microdomain

Influenza Vaccine

RecA and DNA

Bacteriophage T4 Infection

Biosites: Blood Plasma

Myelin

Vascular Endothelial Growth Factor (VegF) Signaling

Kinetochore

Biosites: Basement Membrane