Molecule of the Month
May 2021

Fetal Hemoglobin

Fetal hemoglobin allows a growing fetus to receive oxygen from their mother.


3D View:  1FDH




Health Focus: Drugs and the Brain

The brain orchestrates everything we do, sending signals through the nervous system to control different parts of our body. The brain is also the home of our thoughts and consciousness, as neurons process the input from our senses and store what they find as memories. Many drugs are available to help tune the function of the brain and nervous system when there are problems. Unfortunately, the effects of some drugs are hard to control and can lead to abuse and addiction. Explore PDB-101 Resources to learn about proteins related to our nervous system and mental health.

2021 Video Challenge for High School Students

Molecular Mechanisms of Drugs for Mental Disorders

Vote for the Viewer's Choice Award until May 10. All award winners will be announced on PDB-101 and on May 18.

Quick Links

The Challenge | Vote | Judges | Learn

2021 Video Challenge key visual
Celebrating 50 Years of Protein Data Bank
Celebrating 50 Years of Protein Data Bank

In 1971, the structural biology community established the single worldwide archive for macromolecular structure data–-the Protein Data Bank (PDB). In 2021, RCSB PDB and wwPDB are celebrating the 50th Anniversary of the PDB with symposia, materials, and more.

Learn: Materials for Exploration
PDB-101 resources and 3D structures of COVID-19 proteins.
Teach: Curricula
The RCSB PDB Curricula provide authentic, hands-on teaching materials, individual and group activities and assessment suggestions.
Education Corner: Using PDB Resources
Exploring the Structure-Function Relationship with Digital and Physical 3D Models of Proteins by Maria Voigt, RCSB PDB
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 ( All rights reserved.



Transfer Ribonucleic Acid (tRNA)

Myoglobin Fold


Hemoglobin (1000)



Induced Lac Repressor

Lac Repressor

DPG-Hemoglobin Complex

Immunoglobulin G (IgG)


Aspartate Transcarbamoylase (ATCase)

Deoxyribonucleic Acid (DNA)

Tomato Bushy Stunt Virus (TBSV)

Hemoglobin S

Lysozyme (512)



Intermolecular Contacts in Hemoglobin S


Cytochrome c (unbound)

Lysozyme (488)

Ribonuclease S


Cytochrome c

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

Poliovirus Neutralization


Influenza Vaccine

Biosites: Blood Plasma

Immunological Synapse

Respiratory Droplet

SARS-CoV-2 mRNA Vaccine

Biosites: Red Blood Cell

Biosites: Muscle

SARS-CoV-2 Fusion


Mycoplasma mycoides

Zika Virus

Escherichia coli Bacterium

Escherichia coli


Biosites: Cytoplasm

HIV in Blood Plasma

Measles Virus Proteins

Coronavirus Life Cycle

Insulin Action


Cellulose Synthase

Excitatory and Inhibitory Synapses

Lipid Droplets

Biosites: Nucleus

Biosites: Basement Membrane

Ebola Virus

SARS-CoV-2 and Neutralizing Antibodies