Molecule of the Month
April 2026

Insect Odorant Receptors

Protein complexes that allow insects to detect a wide variety of volatile compounds

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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.

Ribonuclease S

Intermolecular Contacts in Hemoglobin S

Myohemerythrin

B-DNA

Cytochrome c (unbound)

Myoglobin

Lysozyme (488)

DPG-Hemoglobin Complex

Aspartate Transcarbamoylase (ATCase)

Hemoglobin

Myoglobin Fold

Trypsin

Hemoglobin S

Induced Lac Repressor

Crambin

Deoxyhemoglobin

Lac Repressor

Z-DNA

Tomato Bushy Stunt Virus (TBSV)

DNA

TATA-Binding Protein (TBP)

Collagen

Hemoglobin (1000)

Transfer Ribonucleic Acid (tRNA)

Immunoglobulin G (IgG)

Oxyhemoglobin

Cytochrome c

Lysozyme (512)

Carboxypeptidase A

Deoxyribonucleic Acid (DNA)

A-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

Phage-based COVID-19 Vaccine

Casein Micelle and Fat Globule in Milk

Vascular Endothelial Growth Factor (VegF) Signaling

Kinetochore

HIV-Infected Cell

Autophagy

Biosites: Nucleus

Poliovirus Neutralization

Biosites: Red Blood Cell

JCVI-syn3A Minimal Cell

RecA and DNA

HIV Vaccine

Blood

Ebola Virus

Coronavirus Life Cycle

Last Universal Common Ancestor

Cellulose Synthase

Biosites: Blood Plasma

Coronavirus

Influenza Virus

Influenza Vaccine

Immunological Synapse

Bacteriophage T4 Infection

SARS-CoV-2 Fusion

Myoglobin in a Whale Muscle Cell

Lipid Droplets

Measles Virus Proteins

Excitatory and Inhibitory Synapses

Transfer RNA and Gag Protein

Biosites: Muscle

Mycoplasma mycoides

Caulobacter Polar Microdomain

Insulin Action

Insulin Release

Red Blood Cell Cytoskeleton

HIV in Blood Plasma

SARS-CoV-2 and Neutralizing Antibodies

Model of a Mycoplasma Cell

Respiratory Droplet

Collagen and Extracellular Matrix

Abiogenesis

SARS-CoV-2 mRNA Vaccine

Biosites: Basement Membrane

Myelin

Escherichia coli

Escherichia coli Bacterium

Zika Virus

CytoSkeleton

Chloroplast

Biosites: Cytoplasm