Amino Acids

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Thank you for making a video where you SPEAK on a subject that I searched for. So many videos on amino acids are just musical power points with no narration. I don't want to sound like a dumb tool, but when I visit KZbin it isn't because I'm itching for a good read. Much appreciated!

[@ProfessorDaveExplains]

thanks for the kind words!

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Am

[@amazingthings1396]

Vital amino acids. For damaged DNA,,, , .

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[@ProfessorDaveExplains]

you bet! thanks for watching!

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I have been searching for the past hour for a comprehensive explanation of amino acids in biochemistry. This guy has finally ended my search!

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[@susworld129]

I didn't know any of this stuff, I take L-Phenylalanine, L-Arginine, L Ornithine and L- Lycine with Niacin, C and glycine and sometimes I do take them with a tall glass of apple cider vinager and water. Now I have to re learn everything I thought I knew. Thank you so much. I very rarely eat meats so I take these and they energize me is the main reason I take them. They also help me to think. I do drink two glasses of the acv mix so my system stays non acidic or so I thought. Thank you, again.

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god sent jesus to earth to teach us some chemistry

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That is, because god is a chemisist. He made us of amino acids in a lab called: Show more.

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great explanations, made easier to understand with illustrations.

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Thanks from Italy, you're awesome Dave

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Your english is really easy to catch and understand, you're helping me quite alot, thank you from Brazil.

[@luvisacigarette8]

@3:14 there's a switch in the amino group of the zwitterion (H2N to H3N). In this sense, the cationic form should be understood as when the carboxyl group being protonated [as opposed to what was said @3:03]. Is this accurate?

[@ProfessorDaveExplains]

the carboxyl must also remain protonated, but the amino group being protonated is what gives it the positive charge

[@luvisacigarette8]

@@ProfessorDaveExplains Thanks for the prompt response. Quick follow up: if the *amino group* being protonated is what gives it the positive charge, why is it that the difference between the cationic and the zwitterionic forms is found in the carboxyl group (COO- in zwitterion to COOH in cation)? Wouldn't the tacked on proton to the carboxyl group be the main factor yielding the positive charge?

[@ProfessorDaveExplains]

But carboxyls are not positively charged they’re neutral

[@luvisacigarette8]

@@ProfessorDaveExplains Ah! I was blind to that. Thanks for your help as always!

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Love from India. Thank you so much sir for better explanation..

[@Arman-wq9kc]

I was wondering why Nitrogen in the amino group has a lone pair which makes it basic. Thinking that it makes the amino acid unstable. Thank you Professor Dave, for explaining that that's how amino acids react.

[@fishcious]

Nitrogen has 4 orbitals and 5 electrons in its valence shell. Since each orbital can hold at max 2 electrons, N has one full orbital and 3 orbitals w/ 1 electron each (these are the ones that make bonds so that N 'feels like' it has a full (8 electrons) valence shell. The orbital that is already full is that lone pair and since it has a partial negative charge, that makes it slightly basic because that partial negative charge can attract and hold onto a positive H+ ion.

[@Rohit-TROPS]

​@@fishcious hmm...

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ধ

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Zwitterionic... Now you're just making up words 😂

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Thanks Professor Dave, your videos are helping me in Biochemistry.

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Every time I want to learn something I fall into these endless rabbit holes. I just wanted to know what a protein is and what a vitamin does. I still don't, but now I'm aware that I also don't understand what an enzyme is, what carbohydrates are, or amino acids, genes, DNA, RNA, organic compounds, the inner works of cells. Man... I need a few dozen lives just to grasp the slightest nip.

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Ikr? That channel is great but too slow sometimes

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[@ProfessorDaveExplains]

hey i'm not standing awkwardly! i just don't feel the need to make superfluous gesticulations :)

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The substitution of a single amino acid in a cell receptor might have a significant effect on the receptor's structure and function. Can you explain an example. How about disease were a receptor is affected?

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i talk a lot about this in my DNA damage tutorial! i go through the different kinds of mutations and how they might affect enzyme/receptor function.

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Thank you

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beautifully explained .simple and Intresting 😊

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Guy doing his best .....

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Thank you for making and sharing this video!

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[@joymarkman3375]

Interesting, thank you Prof Dave, however, I never learnt about chemicals in the body at school, so still trying to understand Amino-Acids

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PROFESSOR DAVE, YOU ARE THE BEST!!!

[@irinabains4300]

amazing videos, just had a quick question. why does an acidic solution favor the cationic form? and the same with basic solutions and the anionic form

[@ProfessorDaveExplains]

well acids protonate things, so if there's lots of acid around, it will protonate whatever's in there. bases deprotonate things, so with lots of base, everything in there is deprotonated.

[@irinabains4300]

@@ProfessorDaveExplains alright so basically in an acidic solution the zwitterionic form of amino acids gets protonated, leading to the formation of the cationic form, hence the acidic sol favoring the cationic form.

[@ProfessorDaveExplains]

yep that's right

[@irinabains4300]

@@ProfessorDaveExplains alright perfect thank you sm for the help, really appreciate it

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[@Rod-bp8ow]

Some of the phenyl, or phenylalanine group of amines can be dissected in order to classify its order. The phenyl kenutrics, phenylalanine, the types of phenyl that are addictive substances or chemicals that makes one, want or crave for those types of addictive substance. They are also not good specially when ingested in quantities allowed per formula be it compound and non compound active ingredients. Every percentage of the active ingredient can be dissected, in order to have the desired group, either they bind, or repel one another. Valent and co valent. SME GPS all fields of studies that is for excellence.

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[@normahostetler7859]

Thank you for breaking it down so simply and I love visuals!

[@Rohit-TROPS]

Yeah!!

[@Stefan-jl3oc]

1:06 what this 'standard block' they all have is named? I can find the 20 amino acid names quiet easily on the internet, but doesnt this base block have a name itself????

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Sir DAVE is always helpful to students!!.....tq sir

[@shayanakhavan6002]

What are some tips for Amino Acid synthesis? The next chapter we are working on focuses on synthesis-- Is it straight forward?

[@ProfessorDaveExplains]

hmmm, like biosynthetic pathways or laboratory stuff? i'll look into it!

[@shayanakhavan6002]

Biosynthetic pathways! I think it's the use of gabriel synthesis and strecker synthesis to make amino acids?

[@ProfessorDaveExplains]

ah yes, gabriel and strecker are the only two i'm familiar with! would have to refresh my memory.

[@timthefinner]

+Professor Dave Explains There would be also the stereospecific Schöllkopf method. I asked about Amino acid synthesis (Gabriel, Strecker, schöllkopf) and deconstruction (for example hofmann) in an Email but i guess it landed in your Spam folder :( anyways keep up the awesome work

[@ProfessorDaveExplains]

sorry about that! email again if you like! i will look out for it.

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[@AnuragNasa]

Would an acidic solution not favour the anionic form? Since the excess protons in the acid will then be able to neutralize the anion. Great video by the way!!

[@ProfessorDaveExplains]

but acids protonate things! so any basic functional groups will be protonated by an acid, and you get the cationic form.

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At the end of the video, how was alanine protonized AND deprotonized at the same time? Right before that Professor Dave said it could be either of the two states depending on the pH of the environment.

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