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.

Deoxyhemoglobin

Deoxyribonucleic Acid (DNA)

Myoglobin

Myoglobin Fold

DNA

Oxyhemoglobin

Lysozyme (488)

Carboxypeptidase A

Intermolecular Contacts in Hemoglobin S

Crambin

Trypsin

Induced Lac Repressor

Immunoglobulin G (IgG)

Hemoglobin (1000)

Hemoglobin

Transfer Ribonucleic Acid (tRNA)

A-DNA

Ribonuclease S

Collagen

Lac Repressor

TATA-Binding Protein (TBP)

Aspartate Transcarbamoylase (ATCase)

Lysozyme (512)

Tomato Bushy Stunt Virus (TBSV)

Z-DNA

Myohemerythrin

Hemoglobin S

Cytochrome c

DPG-Hemoglobin Complex

B-DNA

Cytochrome c (unbound)

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

CytoSkeleton

Casein Micelle and Fat Globule in Milk

Model of a Mycoplasma Cell

Blood

Insulin Action

Myoglobin in a Whale Muscle Cell

Autophagy

Zika Virus

Poliovirus Neutralization

Measles Virus Proteins

HIV Vaccine

Ebola Virus

HIV in Blood Plasma

Respiratory Droplet

Transfer RNA and Gag Protein

Biosites: Basement Membrane

Escherichia coli Bacterium

JCVI-syn3A Minimal Cell

Biosites: Blood Plasma

Last Universal Common Ancestor

SARS-CoV-2 Fusion

Escherichia coli

Insulin Release

Biosites: Nucleus

SARS-CoV-2 and Neutralizing Antibodies

Lipid Droplets

Kinetochore

Cellulose Synthase

Chloroplast

Collagen and Extracellular Matrix

Mycoplasma mycoides

Excitatory and Inhibitory Synapses

Biosites: Muscle

SARS-CoV-2 mRNA Vaccine

RecA and DNA

Vascular Endothelial Growth Factor (VegF) Signaling

Red Blood Cell Cytoskeleton

Biosites: Cytoplasm

Abiogenesis

Influenza Vaccine

Coronavirus

Biosites: Red Blood Cell

Immunological Synapse

HIV-Infected Cell

Influenza Virus

Bacteriophage T4 Infection

Phage-based COVID-19 Vaccine

Coronavirus Life Cycle

Myelin

Caulobacter Polar Microdomain