Related Experiment Video
Updated: Feb 7, 2026

In Vitro Biochemical Assays using Biotin Labels to Study Protein-Nucleic Acid Interactions
Published on: July 17, 2019
Assessment of S-Glutathionylated Rac1 in Cells Using Biotin-Labeled Glutathione
Hannah Edenbaum1, Jingyan Han2
1Vascular Biology Section, Evans Department of Medicine, Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA, USA.
Abstract:
Rac1 is a member of the family of small Rho GTPases that are molecular switches governing a variety of fundamental cellular processes, such as cell growth and motility. Its subcellular location and activity are regulated by several posttranslational modifications. S-glutathionylation, the adduction of glutathione to cysteine residues in Rac1, is a redox-dependent thiol modification and is generally associated with oxidative/nitrosative stress, representing a novel mechanism of GTPase regulation. Here, we describe the use of biotin-labeled glutathione to monitor intracellular glutathionylated Rac1 in response to exogenous stimuli.
Related Concept Videos
Phase II Reactions: Glutathione Conjugation and Mercapturic Acid Formation
Several distinctive characteristics distinguish glutathione conjugation from other phase II...
Labeling Emotion
Labeling DNA Probes
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
Assessment of the Mouth
Mouth Inspection
The inspection begins with visually examining the mouth for symmetry, color, and size.
Assessment of Respiration
Subjective Assessment: Nurses interview the patient to gather information directly during the subjective assessment. It includes questions about the individual's medical history, medications, and symptoms, focusing on past respiratory conditions like...
Nursing Assessment
The nurse collects all aspects of the patient's health in the initial assessment, establishing priorities for ongoing focused assessments...

