Much like the early Star Trek tricorders, a new and advanced camera for high-resolution, single particle, cryo-electron microscopy (cryoEM), will help reveal the secrets of biological structures. With support from the National Science...

Mammalian Pyridoxine (Vitamin B6) Processing & Metabolism

Lesson on the Inositol Trisphosphate (IP3) and Calcium Signaling Pathway. IP3, calcium and diacylglycerol (DAG) are important second messengers that are unregulated upon activation of a G protein-coupled receptor. Inositol triphosphate...

Phosphodeoxyribomutase: Physiology, Biochemistry, and Mechanism

Looking at different types of protons in the context of NMR spectroscopy.

This video explores the biotin cycle. How is biotin attached to an enzyme? How is it removed? Is biotin recycled?<br/>

The Chlorophyll Cycle

Phenylketonuria Enzymatic Pathways

Cysteine Catabolism to Pyruvate

The video is a lecture on organic chemistry, introducing key concepts such as hydrocarbons, functional groups, homologous series, and isomerism. The speaker explains how organic molecules can be represented in different ways, using...

Anti-science mentality is prevalent in modern society. This is evidenced most clearly in a complete distrust of chemicals synthesized in a laboratory. But does the activity of a molecule depend whatsoever on the pathway from which it...

In this video, we discuss the following: 1) the mechanism of creatinine production from creatine phosphate (PCr). 2) the conditions under which its kinetics are accelerated. 3) how creatinine is excreted by the body.

Oxygen Consuming Enzymes

This video tutorial discusses the Nicotinic cholinergic receptors: 0:00. Intro 0:17. What are cholinergic receptors? 0:31. What are nicotinic receptors? 1:47. What are the 2 types of nicotinic receptors? 2:07. Nm. Nicotinic muscle...

Nucleotide Metabolism | Purine Biosynthesis 2: IMP to AMP & GMP

In this video, we will discuss the bacterial biosynthesis of vitamin B7, biotin.

An introduction to ozonolysis.

We've learned about VSEPR theory, and we know how to use it to predict molecular geometry for a variety of organic molecules. But in fact, there are situations where predictions made with VSEPR theory do not line up with experimental...

Lesson on Methionine Metabolism and the Activated Methyl Cycle. Methionine is a sulfur-containing essential amino acid, which can be processed within the activated methyl cycle to produce s-adenosyl methionine (SAM) and...

Glycerophosphate Shuttle Mitochondrial NADH Transport

PRPP Synthetase Function

Corrin/B12 Biochemistry: Cobalamin Adenosyltransferase

It explains types of molecular orbital's, contours and energies of bonding and anitbonding molecular orbitals.

In this week’s episode of NSF Science Now, we explore Arctic walrus habitats, Cave2, pandas and, finally, algae and biofuels.