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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3D View:  7S6C

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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)

A-DNA

Tomato Bushy Stunt Virus (TBSV)

DNA

Lac Repressor

Trypsin

Lysozyme (512)

Hemoglobin (1000)

Hemoglobin S

Oxyhemoglobin

Cytochrome c (unbound)

B-DNA

Z-DNA

TATA-Binding Protein (TBP)

Collagen

Deoxyribonucleic Acid (DNA)

Myoglobin Fold

Cytochrome c

Hemoglobin

Lysozyme (488)

Aspartate Transcarbamoylase (ATCase)

Intermolecular Contacts in Hemoglobin S

Myohemerythrin

Carboxypeptidase A

Transfer Ribonucleic Acid (tRNA)

Ribonuclease S

Myoglobin

Deoxyhemoglobin

Crambin

Induced Lac Repressor

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

Myelin

Coronavirus

SARS-CoV-2 and Neutralizing Antibodies

Insulin Action

Myoglobin in a Whale Muscle Cell

Phage-based COVID-19 Vaccine

HIV in Blood Plasma

Collagen and Extracellular Matrix

Escherichia coli Bacterium

Coronavirus Life Cycle

RecA and DNA

Insulin Release

CytoSkeleton

Poliovirus Neutralization

Blood

Immunological Synapse

Autophagy

Excitatory and Inhibitory Synapses

Biosites: Cytoplasm

Biosites: Nucleus

HIV-Infected Cell

Zika Virus

SARS-CoV-2 mRNA Vaccine

Red Blood Cell Cytoskeleton

HIV Vaccine

Mycoplasma mycoides

SARS-CoV-2 Fusion

Biosites: Basement Membrane

Ebola Virus

Cellulose Synthase

JCVI-syn3A Minimal Cell

Biosites: Muscle

Biosites: Red Blood Cell

Bacteriophage T4 Infection

Vascular Endothelial Growth Factor (VegF) Signaling

Last Universal Common Ancestor

Model of a Mycoplasma Cell

Transfer RNA and Gag Protein

Respiratory Droplet

Lipid Droplets

Measles Virus Proteins

Kinetochore

Casein Micelle and Fat Globule in Milk

Biosites: Blood Plasma

Abiogenesis

Chloroplast

Influenza Virus

Influenza Vaccine

Caulobacter Polar Microdomain

Escherichia coli