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.

TATA-Binding Protein (TBP)

Z-DNA

Hemoglobin S

Cytochrome c

Immunoglobulin G (IgG)

Trypsin

Crambin

Carboxypeptidase A

Hemoglobin

Myohemerythrin

Myoglobin

A-DNA

Aspartate Transcarbamoylase (ATCase)

Lysozyme (488)

Lysozyme (512)

Deoxyhemoglobin

Ribonuclease S

Lac Repressor

Oxyhemoglobin

Collagen

Cytochrome c (unbound)

Transfer Ribonucleic Acid (tRNA)

B-DNA

Myoglobin Fold

DPG-Hemoglobin Complex

Hemoglobin (1000)

Intermolecular Contacts in Hemoglobin S

Tomato Bushy Stunt Virus (TBSV)

Induced Lac Repressor

DNA

Deoxyribonucleic Acid (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

Kinetochore

Coronavirus Life Cycle

Respiratory Droplet

Insulin Action

Red Blood Cell Cytoskeleton

SARS-CoV-2 Fusion

Poliovirus Neutralization

Insulin Release

RecA and DNA

Coronavirus

Caulobacter Polar Microdomain

Phage-based COVID-19 Vaccine

SARS-CoV-2 and Neutralizing Antibodies

Biosites: Muscle

Biosites: Basement Membrane

Lipid Droplets

Vascular Endothelial Growth Factor (VegF) Signaling

Abiogenesis

Collagen and Extracellular Matrix

Escherichia coli

Chloroplast

Influenza Vaccine

Model of a Mycoplasma Cell

Bacteriophage T4 Infection

Excitatory and Inhibitory Synapses

Ebola Virus

HIV-Infected Cell

Cellulose Synthase

HIV in Blood Plasma

Blood

SARS-CoV-2 mRNA Vaccine

Last Universal Common Ancestor

Immunological Synapse

Myelin

JCVI-syn3A Minimal Cell

Myoglobin in a Whale Muscle Cell

Mycoplasma mycoides

Measles Virus Proteins

Biosites: Red Blood Cell

Transfer RNA and Gag Protein

Autophagy

Zika Virus

Biosites: Blood Plasma

Influenza Virus

HIV Vaccine

Biosites: Cytoplasm

Biosites: Nucleus

Escherichia coli Bacterium

CytoSkeleton

Casein Micelle and Fat Globule in Milk