Youtor
Episode 713 Peptides A Course on Abiogenesis by Dr James Tour
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=0Hv6KjB0j8Y
In this episode, Dr. James Tour teaches the 2nd class of compounds needed for life: peptides. He identifies gross speculatory claims by others, referring to published literature that confirms the implausibility of the sudden emergence of peptides from amino acids. Dr. Tour also walks the viewer through synthesis, showing that without careful activation, side chain protection, and water-free conditions, amino acids do not polymerize into peptides. He then dispels the view that human-made synthesizers, which were not present on prebiotic earth, somehow render polypeptide synthesis as trivial, let alone the fact that amino acids themselves have never been prepared in homochiral fashion using a prebiotically relevant route. Finally, with no solution to the amino acid sequence that comprises functional proteins, Dr. Tour then shows how some ignore the sequence specificity question necessary for the informational code, and how this dilemma is being pushed to the extraterrestrial in a plea to the heavens. • Video Index: • 00:00 - Introduction • 00:47 - Reasons Intent of this Abiogenesis Series • 02:58 - On Speculatory Fallacies • 06:26 - Synthetic Chemists: Inconceivable • 10:36 - Interesting Proposal Still Falls Short • 12:45 - Basics: Amino Acids, Peptides, Proteins • 16:47 - Separating Amino Acids and Peptides • 18:29 - Solid-Phase Peptide Synthesis • 22:53 - Peptide Structures Explained • 26:03 - Protein Synthesizer Machine Prebiotically Relevant? • 30:57 - Peptide Synthesis: Requirements and Efficiency • 38:23 - Pushing the Amino Acid Sequence to the Celestial • 48:13 - Summary, Equilibrium Memo, and What's Next • Links in this Series | Addressing Abiogenesis Common Misconceptions • ====== • Series Trailer: • Illuminating the Fog Masking Life's O... • ------ • 0 - Reasons for this Series: • Episode 0/13: Reasons // A Course on ... • 1 - Introduction to Abiogenesis: • Episode 1/13: Introduction to Abiogen... • 2 - Primordial Soup: • Episode 2/13: Primordial Soup // A Co... • 3 - Hype: • Episode 3/13: Hype // A Course on Abi... • 4 - Homochirality: • Episode 4/13: Homochirality // A Cour... • 5 - Carbohydrates: • Episode 5/13: Carbohydrates // A Cour... • 6 - Building Blocks of Building Blocks: • Episode 5/13: Carbohydrates // A Cour... • 7 - Peptides: • Episode 7/13: Peptides // A Course on... • 8 - Nucleotides: • Episode 8/13: Nucleotides // A Course... • 9 - Intermediate Summary a Call to Colleagues: • Episode 9/13: Intermediate Summary //... • 10 - Lipids: • Episode 10/13: Lipids // A Course on ... • 11 - Chiral-induced Spin Selectivity: • Episode 11/13: Chiral-induced Spin Se... • 12.1 - Cell Construction The Assembly Problem, Part 1: • Episode 12.1/13: Cell Construction ... • 12.2 - Cell Construction The Assembly Problem, Part 2: • Episode 12.2/13: Cell Construction ... • 13 - Summary Projections: • Episode 13/13: Summary Projections ... • Link to the cited video ( Elucidating the Agenda of James Tour: A Defense of Abiogenesis ) can be found in the video description of Episode 0 - Reasons for this Series here: • Episode 0/13: Reasons // A Course on ... • The passionate thumbnail for this video uses a still frame image taken from Dr. Tour's video on Flash Graphene when he says any in the phrase any carbon source at 0:12: • Flash Graphene Changing the World • If you found this helpful and a blessing to you or learned something new, please share and give this a like or thumbs up. And if you haven't already, please follow/like/subscribe, so you can stayed tuned in. • God bless you. • #Abiogenesis #JamesTour #OriginOfLife • ~ • http://drjamestour.com • Website - http://jmtour.com • Twitter - / drjamestour • Facebook - / drjamestour • LinkedIn - / drjamestour • Instagram - / drjamestour • Snapchat - / drjamestour • WeChat - @drjamestour
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