Molecule of the Month
February 2025

H5 Hemagglutinin

Sugar-binding protein on the surface of the H5N1 avian influenza virus

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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.

Immunoglobulin G (IgG)

Lysozyme (488)

Hemoglobin (1000)

Aspartate Transcarbamoylase (ATCase)

Myohemerythrin

Carboxypeptidase A

Intermolecular Contacts in Hemoglobin S

Transfer Ribonucleic Acid (tRNA)

Oxyhemoglobin

Lysozyme (512)

Tomato Bushy Stunt Virus (TBSV)

Collagen

Cytochrome c (unbound)

TATA-Binding Protein (TBP)

Induced Lac Repressor

Myoglobin Fold

Trypsin

Deoxyribonucleic Acid (DNA)

Deoxyhemoglobin

Hemoglobin

Cytochrome c

Lac Repressor

Z-DNA

DNA

Hemoglobin S

Myoglobin

Ribonuclease S

DPG-Hemoglobin Complex

Crambin

A-DNA

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

Escherichia coli Bacterium

SARS-CoV-2 Fusion

Vascular Endothelial Growth Factor (VegF) Signaling

HIV-Infected Cell

Myoglobin in a Whale Muscle Cell

Zika Virus

Mycoplasma mycoides

Biosites: Muscle

Transfer RNA and Gag Protein

Blood

Last Universal Common Ancestor

Casein Micelle and Fat Globule in Milk

Caulobacter Polar Microdomain

Autophagy

Immunological Synapse

Respiratory Droplet

HIV Vaccine

Biosites: Red Blood Cell

Lipid Droplets

Poliovirus Neutralization

Escherichia coli

Model of a Mycoplasma Cell

Ebola Virus

RecA and DNA

Abiogenesis

Biosites: Cytoplasm

Influenza Vaccine

Insulin Release

Biosites: Nucleus

Kinetochore

Measles Virus Proteins

CytoSkeleton

HIV in Blood Plasma

Myelin

SARS-CoV-2 and Neutralizing Antibodies

SARS-CoV-2 mRNA Vaccine

Collagen and Extracellular Matrix

Cellulose Synthase

Influenza Virus

Excitatory and Inhibitory Synapses

Chloroplast

Phage-based COVID-19 Vaccine

Coronavirus

JCVI-syn3A Minimal Cell

Bacteriophage T4 Infection

Coronavirus Life Cycle

Insulin Action

Biosites: Blood Plasma

Red Blood Cell Cytoskeleton

Biosites: Basement Membrane