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.

Induced Lac Repressor

Z-DNA

Intermolecular Contacts in Hemoglobin S

Carboxypeptidase A

Hemoglobin

TATA-Binding Protein (TBP)

Lysozyme (488)

A-DNA

Aspartate Transcarbamoylase (ATCase)

Collagen

B-DNA

Cytochrome c

Oxyhemoglobin

Crambin

Immunoglobulin G (IgG)

DPG-Hemoglobin Complex

Cytochrome c (unbound)

Tomato Bushy Stunt Virus (TBSV)

Myohemerythrin

Deoxyribonucleic Acid (DNA)

Lysozyme (512)

Myoglobin Fold

Lac Repressor

Trypsin

Hemoglobin (1000)

DNA

Ribonuclease S

Myoglobin

Hemoglobin S

Deoxyhemoglobin

Transfer Ribonucleic Acid (tRNA)

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

Escherichia coli Bacterium

Escherichia coli

HIV-Infected Cell

Biosites: Nucleus

HIV in Blood Plasma

Model of a Mycoplasma Cell

SARS-CoV-2 and Neutralizing Antibodies

Immunological Synapse

Poliovirus Neutralization

Biosites: Red Blood Cell

Lipid Droplets

Mycoplasma mycoides

Influenza Virus

Last Universal Common Ancestor

Myoglobin in a Whale Muscle Cell

Coronavirus

Caulobacter Polar Microdomain

Excitatory and Inhibitory Synapses

Myelin

Kinetochore

Influenza Vaccine

Insulin Release

Coronavirus Life Cycle

SARS-CoV-2 Fusion

Zika Virus

JCVI-syn3A Minimal Cell

Biosites: Cytoplasm

Measles Virus Proteins

Respiratory Droplet

Blood

Vascular Endothelial Growth Factor (VegF) Signaling

Cellulose Synthase

Chloroplast

HIV Vaccine

Abiogenesis

Biosites: Basement Membrane

Autophagy

Collagen and Extracellular Matrix

Transfer RNA and Gag Protein

Phage-based COVID-19 Vaccine

Insulin Action

Red Blood Cell Cytoskeleton

SARS-CoV-2 mRNA Vaccine

Ebola Virus

Biosites: Blood Plasma

Casein Micelle and Fat Globule in Milk

RecA and DNA

Bacteriophage T4 Infection

CytoSkeleton

Biosites: Muscle