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.

Myoglobin

Oxyhemoglobin

Lysozyme (512)

Myoglobin Fold

Ribonuclease S

B-DNA

DPG-Hemoglobin Complex

A-DNA

Crambin

Transfer Ribonucleic Acid (tRNA)

Hemoglobin (1000)

Tomato Bushy Stunt Virus (TBSV)

Immunoglobulin G (IgG)

Induced Lac Repressor

Aspartate Transcarbamoylase (ATCase)

DNA

Z-DNA

Myohemerythrin

Deoxyribonucleic Acid (DNA)

Lysozyme (488)

Intermolecular Contacts in Hemoglobin S

Trypsin

Cytochrome c

Hemoglobin

Carboxypeptidase A

Hemoglobin S

Collagen

Cytochrome c (unbound)

TATA-Binding Protein (TBP)

Lac Repressor

Deoxyhemoglobin

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

JCVI-syn3A Minimal Cell

Insulin Release

Mycoplasma mycoides

Zika Virus

Blood

Bacteriophage T4 Infection

SARS-CoV-2 and Neutralizing Antibodies

Coronavirus

Collagen and Extracellular Matrix

Casein Micelle and Fat Globule in Milk

CytoSkeleton

Lipid Droplets

HIV Vaccine

Escherichia coli Bacterium

Ebola Virus

Coronavirus Life Cycle

RecA and DNA

Abiogenesis

HIV-Infected Cell

Phage-based COVID-19 Vaccine

Biosites: Nucleus

Biosites: Muscle

Caulobacter Polar Microdomain

Cellulose Synthase

Red Blood Cell Cytoskeleton

Respiratory Droplet

Kinetochore

Immunological Synapse

Biosites: Cytoplasm

Autophagy

Myelin

HIV in Blood Plasma

Excitatory and Inhibitory Synapses

Last Universal Common Ancestor

Model of a Mycoplasma Cell

Influenza Virus

Measles Virus Proteins

SARS-CoV-2 Fusion

Insulin Action

Influenza Vaccine

Transfer RNA and Gag Protein

Biosites: Red Blood Cell

Myoglobin in a Whale Muscle Cell

Chloroplast

Vascular Endothelial Growth Factor (VegF) Signaling

Biosites: Blood Plasma

SARS-CoV-2 mRNA Vaccine

Escherichia coli

Biosites: Basement Membrane

Poliovirus Neutralization