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.

Myoglobin

Crambin

Myohemerythrin

Collagen

Transfer Ribonucleic Acid (tRNA)

Induced Lac Repressor

Tomato Bushy Stunt Virus (TBSV)

Oxyhemoglobin

Cytochrome c (unbound)

Carboxypeptidase A

A-DNA

Z-DNA

TATA-Binding Protein (TBP)

Hemoglobin

Hemoglobin (1000)

B-DNA

Intermolecular Contacts in Hemoglobin S

Trypsin

Myoglobin Fold

Deoxyhemoglobin

Deoxyribonucleic Acid (DNA)

DNA

Aspartate Transcarbamoylase (ATCase)

Lac Repressor

Immunoglobulin G (IgG)

Ribonuclease S

DPG-Hemoglobin Complex

Hemoglobin S

Lysozyme (512)

Cytochrome c

Lysozyme (488)

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

SARS-CoV-2 Fusion

Zika Virus

Biosites: Nucleus

HIV-Infected Cell

Red Blood Cell Cytoskeleton

RecA and DNA

SARS-CoV-2 and Neutralizing Antibodies

HIV in Blood Plasma

Influenza Virus

SARS-CoV-2 mRNA Vaccine

Autophagy

Caulobacter Polar Microdomain

Vascular Endothelial Growth Factor (VegF) Signaling

Coronavirus Life Cycle

Myelin

Last Universal Common Ancestor

CytoSkeleton

Blood

Model of a Mycoplasma Cell

Measles Virus Proteins

Biosites: Muscle

Chloroplast

JCVI-syn3A Minimal Cell

Biosites: Cytoplasm

Respiratory Droplet

Biosites: Blood Plasma

Transfer RNA and Gag Protein

Biosites: Basement Membrane

Collagen and Extracellular Matrix

Casein Micelle and Fat Globule in Milk

Escherichia coli

Poliovirus Neutralization

Abiogenesis

Immunological Synapse

Kinetochore

Influenza Vaccine

Insulin Release

Ebola Virus

HIV Vaccine

Lipid Droplets

Phage-based COVID-19 Vaccine

Myoglobin in a Whale Muscle Cell

Bacteriophage T4 Infection

Cellulose Synthase

Biosites: Red Blood Cell

Mycoplasma mycoides

Coronavirus

Excitatory and Inhibitory Synapses

Escherichia coli Bacterium

Insulin Action