Molecule of the Month
January 2025

Assembly Line Polyketide Synthases

Large multienzyme complexes that synthesize diverse small molecules in a stepwise manner.

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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.

Myoglobin Fold

Intermolecular Contacts in Hemoglobin S

Deoxyhemoglobin

A-DNA

Induced Lac Repressor

Oxyhemoglobin

Cytochrome c (unbound)

Myoglobin

Hemoglobin (1000)

Crambin

Z-DNA

Lysozyme (512)

Tomato Bushy Stunt Virus (TBSV)

Transfer Ribonucleic Acid (tRNA)

Myohemerythrin

Deoxyribonucleic Acid (DNA)

Collagen

Hemoglobin S

Carboxypeptidase A

Aspartate Transcarbamoylase (ATCase)

Immunoglobulin G (IgG)

Ribonuclease S

TATA-Binding Protein (TBP)

DNA

Lac Repressor

Lysozyme (488)

B-DNA

Cytochrome c

Hemoglobin

Trypsin

DPG-Hemoglobin Complex

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

SARS-CoV-2 mRNA Vaccine

Myelin

Insulin Release

Lipid Droplets

Ebola Virus

Biosites: Basement Membrane

Phage-based COVID-19 Vaccine

Biosites: Nucleus

SARS-CoV-2 Fusion

Red Blood Cell Cytoskeleton

Myoglobin in a Whale Muscle Cell

Escherichia coli

RecA and DNA

Transfer RNA and Gag Protein

Last Universal Common Ancestor

Coronavirus Life Cycle

Influenza Vaccine

Cellulose Synthase

Escherichia coli Bacterium

Biosites: Muscle

Respiratory Droplet

Kinetochore

Blood

HIV-Infected Cell

Influenza Virus

Insulin Action

Zika Virus

Biosites: Blood Plasma

Casein Micelle and Fat Globule in Milk

Biosites: Cytoplasm

Excitatory and Inhibitory Synapses

Abiogenesis

HIV in Blood Plasma

Bacteriophage T4 Infection

Immunological Synapse

CytoSkeleton

Chloroplast

Coronavirus

Biosites: Red Blood Cell

Measles Virus Proteins

Autophagy

Poliovirus Neutralization

Caulobacter Polar Microdomain

Model of a Mycoplasma Cell

Mycoplasma mycoides

SARS-CoV-2 and Neutralizing Antibodies

Collagen and Extracellular Matrix

HIV Vaccine

JCVI-syn3A Minimal Cell

Vascular Endothelial Growth Factor (VegF) Signaling