Molecule of the Month
February 2026

Histones Across the Tree of Life

Uncovering the evolutionary diversity of histones

More

3D View:  

Style

Color

Spin

Learn
PDB data help explain fundamental biology, biomedicine, bioengineering/biotechnology, and energy sciences
Feature Focus
Use PDB-101 resources to learn how researchers are using biology in industry
Teach
The RCSB PDB Curricula provide authentic, hands-on teaching materials, individual and group activities and assessment suggestions
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.

Hemoglobin (1000)

Deoxyribonucleic Acid (DNA)

Cytochrome c (unbound)

Induced Lac Repressor

Myoglobin Fold

Tomato Bushy Stunt Virus (TBSV)

Lysozyme (512)

DNA

Lysozyme (488)

Crambin

Immunoglobulin G (IgG)

Lac Repressor

Collagen

A-DNA

Z-DNA

Oxyhemoglobin

Cytochrome c

Hemoglobin S

Transfer Ribonucleic Acid (tRNA)

Hemoglobin

Aspartate Transcarbamoylase (ATCase)

Ribonuclease S

Trypsin

Myoglobin

Deoxyhemoglobin

DPG-Hemoglobin Complex

Intermolecular Contacts in Hemoglobin S

Myohemerythrin

B-DNA

Carboxypeptidase A

TATA-Binding Protein (TBP)

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

Biosites: Red Blood Cell

JCVI-syn3A Minimal Cell

Caulobacter Polar Microdomain

Ebola Virus

HIV-Infected Cell

Transfer RNA and Gag Protein

Casein Micelle and Fat Globule in Milk

Biosites: Nucleus

Biosites: Cytoplasm

Blood

Chloroplast

Escherichia coli

HIV Vaccine

Abiogenesis

Zika Virus

Influenza Virus

Lipid Droplets

Vascular Endothelial Growth Factor (VegF) Signaling

SARS-CoV-2 Fusion

Mycoplasma mycoides

HIV in Blood Plasma

Biosites: Blood Plasma

Escherichia coli Bacterium

Red Blood Cell Cytoskeleton

SARS-CoV-2 mRNA Vaccine

CytoSkeleton

Kinetochore

Bacteriophage T4 Infection

Last Universal Common Ancestor

Biosites: Basement Membrane

Coronavirus Life Cycle

Insulin Action

Autophagy

Immunological Synapse

Myelin

Influenza Vaccine

Collagen and Extracellular Matrix

Cellulose Synthase

RecA and DNA

Phage-based COVID-19 Vaccine

Biosites: Muscle

Insulin Release

Coronavirus

SARS-CoV-2 and Neutralizing Antibodies

Model of a Mycoplasma Cell

Respiratory Droplet

Excitatory and Inhibitory Synapses

Myoglobin in a Whale Muscle Cell

Poliovirus Neutralization

Measles Virus Proteins