Molecule of the Month
December 2025

FOXP3

A master transcriptional regulator of immune tolerance

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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.

Hemoglobin S

Transfer Ribonucleic Acid (tRNA)

Deoxyhemoglobin

TATA-Binding Protein (TBP)

Immunoglobulin G (IgG)

Aspartate Transcarbamoylase (ATCase)

Hemoglobin (1000)

Trypsin

Cytochrome c

Z-DNA

DNA

DPG-Hemoglobin Complex

Lac Repressor

Crambin

Myoglobin Fold

Myohemerythrin

Intermolecular Contacts in Hemoglobin S

Tomato Bushy Stunt Virus (TBSV)

Hemoglobin

Oxyhemoglobin

A-DNA

Carboxypeptidase A

Collagen

Ribonuclease S

Induced Lac Repressor

Cytochrome c (unbound)

Myoglobin

Deoxyribonucleic Acid (DNA)

Lysozyme (488)

Lysozyme (512)

B-DNA

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

Insulin Action

Phage-based COVID-19 Vaccine

Bacteriophage T4 Infection

Measles Virus Proteins

Caulobacter Polar Microdomain

SARS-CoV-2 and Neutralizing Antibodies

Casein Micelle and Fat Globule in Milk

Lipid Droplets

Biosites: Nucleus

Biosites: Muscle

Escherichia coli Bacterium

Zika Virus

Biosites: Red Blood Cell

Poliovirus Neutralization

Coronavirus

JCVI-syn3A Minimal Cell

Influenza Vaccine

Myelin

Myoglobin in a Whale Muscle Cell

Blood

Autophagy

Red Blood Cell Cytoskeleton

HIV Vaccine

Collagen and Extracellular Matrix

Biosites: Blood Plasma

RecA and DNA

Last Universal Common Ancestor

Biosites: Basement Membrane

Abiogenesis

Coronavirus Life Cycle

SARS-CoV-2 Fusion

Immunological Synapse

Influenza Virus

Insulin Release

CytoSkeleton

Chloroplast

Transfer RNA and Gag Protein

Respiratory Droplet

Excitatory and Inhibitory Synapses

HIV in Blood Plasma

Kinetochore

Model of a Mycoplasma Cell

Biosites: Cytoplasm

Escherichia coli

HIV-Infected Cell

Cellulose Synthase

Vascular Endothelial Growth Factor (VegF) Signaling

SARS-CoV-2 mRNA Vaccine

Ebola Virus