Related Experiment Video

Updated: Aug 17, 2026

Profiling of Methyltransferases and Other S-adenosyl-L-homocysteine-binding Proteins by Capture Compound Mass Spectrometry (CCMS)
17:12

Profiling of Methyltransferases and Other S-adenosyl-L-homocysteine-binding Proteins by Capture Compound Mass Spectrometry (CCMS)

Published on: December 21, 2010

Methionine metabolism in mammals. Distribution of homocysteine between competing pathways

J D Finkelstein, J J Martin

    The Journal of Biological Chemistry
    |August 10, 1984
    PubMed

    More Related Videos

    Metabolic Pathway Confirmation and Discovery Through 13C-labeling of Proteinogenic Amino Acids07:26

    Metabolic Pathway Confirmation and Discovery Through 13C-labeling of Proteinogenic Amino Acids

    Published on: January 26, 2012

    Evaluation of Amino Acid Consumption in Cultured Bone Cells and Isolated Bone Shafts06:32

    Evaluation of Amino Acid Consumption in Cultured Bone Cells and Isolated Bone Shafts

    Published on: April 13, 2022

    Related Concept Videos

    Mismatch Repair01:36

    Mismatch Repair

    Overview
    Urea Cycle01:23

    Urea Cycle

    The urea cycle describes how liver cells convert ammonia to urea. Ammonia is a toxic waste product of protein catabolism. Land animals must convert ammonia into the less toxic urea which can be safely eliminated by the kidneys through urine. Marine animals excrete ammonia directly, and the surrounding water dilutes the ammonia to safe levels.
    Mismatch Repair01:20

    Mismatch Repair

    Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
    The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
    The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
    Phase II Reactions: Methylation Reactions01:17

    Phase II Reactions: Methylation Reactions

    Methylation is a phase II biotransformation process involving the attachment of a methyl group to a substrate. Enzymes known as methyltransferases orchestrate this reaction.
    The mechanism of methylation unfolds in two stages. The first stage sees a methyltransferase enzyme facilitating the transfer of a methyl group from S-adenosylmethionine (SAM) to the substrate, forming S-adenosylhomocysteine (SAH). The second stage involves further metabolism of SAH into homocysteine, which can be recycled...
    Introduction to Metabolism01:30

    Introduction to Metabolism

    Metabolism encompasses all biochemical reactions in a living organism, facilitating both the breakdown and synthesis of biomolecules. These metabolic processes are categorized into catabolic and anabolic pathways, which operate in a coordinated manner to ensure energy balance and cellular function.Catabolic Pathways and Energy ReleaseCatabolic pathways involve the breakdown of complex macromolecules such as carbohydrates, lipids, and proteins into smaller structures like monosaccharides, fatty...
    Amino Acid Biosynthetic Pathways01:29

    Amino Acid Biosynthetic Pathways

    Amino acid biosynthesis is essential for cell growth, protein synthesis, and metabolic regulation. Cells generate essential and non-essential amino acids from metabolic intermediates to sustain vital biological functions. These intermediates originate from key metabolic pathways: glycolysis, the tricarboxylic acid (TCA) cycle, and the pentose phosphate pathway. Important precursors include α-ketoglutarate, pyruvate, oxaloacetate, phosphoenolpyruvate, and erythrose-4-phosphate, which provide...