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.

Carboxypeptidase A

Lysozyme (512)

Ribonuclease S

Deoxyribonucleic Acid (DNA)

Immunoglobulin G (IgG)

Deoxyhemoglobin

Hemoglobin

Aspartate Transcarbamoylase (ATCase)

Lac Repressor

TATA-Binding Protein (TBP)

Tomato Bushy Stunt Virus (TBSV)

Induced Lac Repressor

Hemoglobin (1000)

Z-DNA

Myohemerythrin

B-DNA

Trypsin

DNA

Transfer Ribonucleic Acid (tRNA)

Lysozyme (488)

Myoglobin Fold

Cytochrome c (unbound)

Oxyhemoglobin

Cytochrome c

DPG-Hemoglobin Complex

Hemoglobin S

Intermolecular Contacts in Hemoglobin S

Myoglobin

Crambin

A-DNA

Collagen

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

Mycoplasma mycoides

SARS-CoV-2 Fusion

Escherichia coli Bacterium

Transfer RNA and Gag Protein

Myoglobin in a Whale Muscle Cell

Biosites: Muscle

Coronavirus Life Cycle

Insulin Action

Zika Virus

Vascular Endothelial Growth Factor (VegF) Signaling

Influenza Vaccine

CytoSkeleton

Chloroplast

Respiratory Droplet

Collagen and Extracellular Matrix

Measles Virus Proteins

SARS-CoV-2 mRNA Vaccine

Biosites: Nucleus

Coronavirus

Casein Micelle and Fat Globule in Milk

Influenza Virus

Model of a Mycoplasma Cell

Kinetochore

Blood

Red Blood Cell Cytoskeleton

SARS-CoV-2 and Neutralizing Antibodies

Bacteriophage T4 Infection

HIV-Infected Cell

Cellulose Synthase

Phage-based COVID-19 Vaccine

Biosites: Red Blood Cell

Lipid Droplets

Myelin

RecA and DNA

Biosites: Cytoplasm

Escherichia coli

Excitatory and Inhibitory Synapses

HIV Vaccine

Poliovirus Neutralization

Biosites: Basement Membrane

Abiogenesis

Biosites: Blood Plasma

Insulin Release

Immunological Synapse

Caulobacter Polar Microdomain

Last Universal Common Ancestor

Autophagy

Ebola Virus

HIV in Blood Plasma

JCVI-syn3A Minimal Cell