Explained this in a much easier way than my professor. Thank you!
@jessjms11817 жыл бұрын
Your voice is articulate and easy to focus on
@alimamstudying94622 жыл бұрын
This video saved me thank u so much❤❤
@tinotendamuungani65322 жыл бұрын
powerful presentation ,you really explained it better and it's now easier for me to classify amino acids ..Thank you
@ShinySephiroth15 жыл бұрын
Who else listens to a particular video over and over and over again until you get that light bulb moment on each category discussed?
@torlarsen22124 жыл бұрын
Same here man, science high five!
@kishankumargaur65403 жыл бұрын
Voice with synchronisation to the written manner is a great idea.....
@Muhaymin222 жыл бұрын
I love your voice that makes me feel good.
@llDietryingll7 жыл бұрын
Thank you so much, very big help for my orgo 2 final exam
@Eddiecole_5 жыл бұрын
To help with the confusion involving the Aromatic Tyrosine and Tryptophan, as well as the Non-Aromatic Methionine; let it be considered that all three are Amphipathic amino acids. This means that they tend to have both polar and non-polar characteristics within their structures. Amphipathic amino acids are often found at the surface of proteins or lipid membranes, which is why they are sometimes classified as polar. However, even though Tyr and Trp have polar groups (-OH and the indol nitrogen), which can H-bond, these AAs are still hydrophobic due to their large hydrocarbon content. Methionine, on the other hand, tends to stay closer to the center of cells because it is mostly non-polar due to having the non-polar hydrocarbons, which is why most of the time you see that it is such. However, it is also weakly polar due to its thioether in the side chain, giving it amphipathic characteristics. *knowing the polarity properties of the groups "within" side chains will help you get a better understanding of amino acids overall characteristics.*
@neechiokwor9 жыл бұрын
Great video really helped me understand my text. NOTE: The -CH2 group is missing in the structure of Tyrosine. Thanks!
@girtonm5 жыл бұрын
Regarding the drawing of tyrosine, the CH2 group is there para to the hydroxyl; it is represented by an angle in the structure.
@isaacsa806011 жыл бұрын
Thank You!
@Ali_Haider31302 жыл бұрын
thank you very much
@nerfguns12344 жыл бұрын
The more I turned down my volume, the louder she got
@mishca51163 жыл бұрын
It is the vocal fry ...makes her voice so hard on my ears.
@hopeenvy3 жыл бұрын
Same😪
@davidstevens90253 жыл бұрын
Are you wearing headphones?
@susannadsouza44844 жыл бұрын
Thank you so much for these lecs!!!!!!
@benjaminlee59768 жыл бұрын
Alcohol groups as side chains make amino acids polar.
@shalminpohtam09995 жыл бұрын
Yup..it forms h-bondig right with water...
@ancientmedia63153 жыл бұрын
keep it up wonder full lecture
@DaniaNasir-i4v8 ай бұрын
Well explained 🙏🏻☺️
@akingbolamoyosore65603 жыл бұрын
Thank you
@nujoodalawwad11647 жыл бұрын
Actually I love her voice
@itskhani11124 жыл бұрын
Thanks alot.....
@MolecularArts10 жыл бұрын
1:42 This is probably beyond the scope of this video, but the hydrophobic amino acids do interact with water through van der Waals forces. The hydrophobic effect is very complex and involves subtle entropic effects, for example, hydrophobic side-chains force surrounding water molecules to adopt entropically unfavorable "structured" (clathrate cage) configurations.
@parislove54384 жыл бұрын
Thank youuuuu 🤪
@nyawirawaithaka49935 жыл бұрын
Thank you. Very well summarized.
@tijsdjoos86634 жыл бұрын
I really love her voice
@tijsdjoos86634 жыл бұрын
quality of the video was ok
@sirajuddin87732 жыл бұрын
I never fully attend the khan academy class becz of its methode plz you change ur methode of lecture regards
@LinhTruong-jk8zq6 жыл бұрын
Big thanks for you, you’ve made this aa stuffs be an easier one to acquire
@sciencenerd76392 жыл бұрын
Very nice, but I would like to point out that tyrosine really is hydrophobic. This is because, even though it has a hydroxyl, the aromatic portion is so big and bulky that the amino acid is hydrophobic overall.
@torlarsen22124 жыл бұрын
Hey umm thank you so much for this!! You're voice is really cute by the way
@adelzekry6843 жыл бұрын
@I'M NOT sAD I'M JUsT TIRED lmao
@linasing1006 жыл бұрын
Great video!!! helps alot
@tariqahmad57816 жыл бұрын
The God has bestowed her with that particular voice and hence cannot be criticised
@MolecularArts10 жыл бұрын
4:36 Tyrosine is also aromatic.
@JacksonReynolds8 жыл бұрын
Correct, but I assume she left it out of the group of aromatics due to the polarity conferred to it by its hydroxyl group.
@rachellarson47775 жыл бұрын
I thought that since it had an OH group on the arene structure, it turns the arene and the OH into a phenol group, and phenol groups are defiantly polar.
@boodobbyslowerrank80356 жыл бұрын
THANK YOU!
@anish63505 жыл бұрын
Your sound is aromatic
@floydkazenene958511 жыл бұрын
wooooooooow! good lecture keep it high
@Dan141810 жыл бұрын
I love your voice.
@plantbasednatural25487 жыл бұрын
But methionine has a sulphur atom in the side chain so why is it non-polar if the neutral polar amino acids are that way because they have either an oxygen or a sulphur atom in the side chain?
@ibi96366 жыл бұрын
thankyouuuuu
@sagarkucha91606 жыл бұрын
Nice
@rebeccakane88545 жыл бұрын
0:59 video starts
@matt.pma.kresnaputra54585 жыл бұрын
CAUTION: Tyrosine is NOT considered hydrophilic/polar... the AAMC considers tyrosine as a non-polar/hydrophobic aromatic amino acid
@babygurll76 жыл бұрын
But asparagine and glutamine also have nitrogens in their side chains. From how you explained remembering basic amino acids (by seeing there are nitrogens) shouldn't asparagine and glutamine also be basic ? You skipped over them in your neutral amino acid explanation saying those have oxygens or sulfur.
@umaranwar22936 жыл бұрын
The have nitrogen but to a side not in the straight linear chain that's why not counted. As well as tryptophan has nitrogen but not counted because the aromatic behaviour prevent it to make amino acid basic.
@xXSherviNXx9 жыл бұрын
Isn't Tyrosine aromatic?
@nathanstumpf9 жыл бұрын
It is aromatic for sure, but also polar I guess?
@neechiokwor9 жыл бұрын
+nathan stumpf Yes that is due to the hydroxyl group it bears.
@sunnyyoda55117 жыл бұрын
Okwor Neechi yes Nathan is right, it has hydroxyl group making it polar
@AmyStylinson7 жыл бұрын
Right? It's aromatic and it's important that it's classified under aromatic because those 3 contribute to fluorescence
@poojaramesh11333 жыл бұрын
Hii there ..shouldn't proline be classified under aromatic side chain group?? please tell me..
@sshirish91676 жыл бұрын
Nice video......Good explanation :-) :-)........And guys, her voice is perfectly normal
@MyB.S._channel Жыл бұрын
'The wife' told me to get ride of my " side piece." I told her I would replace it with my own individual "side chain "
@MolecularArts10 жыл бұрын
3:00 Glycine is not normally counted among the hydrophobic amino acids. The side-chain is so small (-H) that the properties of the amino and carboxylic acid groups dominate. Pure glycine is highly soluble in water.
@mygoldentruth10 жыл бұрын
You're right, at least in near neutral pH (as plasma, or any pH around 3-9) it has both groups charged, thus polar! Nice annotation.
@ramil80294 жыл бұрын
People are talking so much trash in the comments, it's ridiculous. With this attitude, I really have no idea why you're watching MCAT prep courses.
@thefenerbahcesk41565 жыл бұрын
So hydrophillic will be on the surface of a protein and hydrophobic in the interior?
@iqrakhan43174 жыл бұрын
Depends on the type of protein. If it is water soluble protein hydrophilic amino acids will be on the surface while hydrophobic amino acids will be in interior to maintain the protein structure. If it is membrane surface protein then hydrophobic amino acids will be on the surface and hydrophilic amino acids will be in the interior. So it depends upon the type of protein.
@Aafiaeh5 ай бұрын
my textbook teaches tyrosine as nonpolar aromatic
@pizzacheeseman285411 ай бұрын
I think cystine is hydrophobic?
@ecwgct6 жыл бұрын
What is alkyl? Does it mean alkaline?
@Rohit_Kumar1865 жыл бұрын
Alkaline means basic in nature while alkyl is formed when one H is removed from an alkane, Like -CH3 is alkyl group( 1 H has been removed from methane i.e CH4) and is called methyl. And that is how you proceeed to other alkanes
@cat52204 жыл бұрын
What about glycine?
@GodlovesAmerica079 жыл бұрын
Methionine has sulfur in its side chain. Shouldn't it be polar? Pls clarify
@iiii79829 жыл бұрын
+GodlovesAmerica07 I simplify the real fact, but consider the S is central in methionine' side chain and does not move the electric barycentre.
@Awesiim Жыл бұрын
The sulfur in methionine has methyl's on each side, so the dipoles cancel out. In Cysteine the sulfur only has one methyl and has a net dipole
@manohad57 жыл бұрын
We learnt that there are 5 types of aminoacids Posetive Negative Polar nonPolar and Aromatic can one amino acid be in 2 groups ? because Serine according to you is Polar but it also have charge so not sure wheather i should put it as posetive\ or polar help please ?
@stavroskar97407 жыл бұрын
I dont get how aminoacids with oxygen are acidic whereas those with nitrogen are basic, since both elements are electronegative.
@michaelmorgan-ellcessor52216 жыл бұрын
Oxygen is more likely to give away protons in the form of a positively charged hydrogen making it more of an acid. Nitrogen however usually receives this proton making it basic. It is helpful to memorize that acids tend to give away protons while bases like to receive them. I hope this helped.
@David-Eng7 жыл бұрын
I think she's got a pretty voice.👌🏼
@Jerseygirltrader247 жыл бұрын
IMHO, the way she explains the basic aa is not very accurate. Trp has N on the side chain, but it’s non polar. Gln has N on the side chain, but it makes an amide, so it’s polar neutral.
@liamjacques19105 жыл бұрын
Good video, but the explanations and groupings aren't entirely correct.
@AshleyxScreamx7 жыл бұрын
I don't understand this lol I'm gonna fail :(
@ramyemad63256 жыл бұрын
Ashley. Feel you got an exam the day after tomorrow :'(
@emmarichard17095 жыл бұрын
Did you?
@emmarichard17094 жыл бұрын
John Wayne I passed actually lol this was so long ago wow
@Roxxxycat6 жыл бұрын
Why is it that in some places Cysteine is Nonpolar and in other places they say it's Polar? ughh which is it
@ChompNom6 жыл бұрын
i really like the handwriting
@Tosolo-dh2co2 жыл бұрын
Appriciate the work, but this video has a lot of small damning mistakes which makes it counterproductive and leads to us students having to spend a lot of time looking things up.
@josephsanjuan62354 жыл бұрын
isn't histidine aromatic?
@MolecularArts10 жыл бұрын
1:05 There are 21 proteinogenic amino acids in most organisms! The 21st is selenocysteine.
@jordanhaynes11108 жыл бұрын
so I have to Drink a protein sub because I have pku but in the ingredients it says like L-this and L-that any ideas what those are
@unamed55558 жыл бұрын
+jordan haynes its in reference to sterochemistry of the molecule itself. L-amino acids are the ones that we use in our body and most commonly found in nature. Someone with PKU should not have to worry about the L- prefixes.
@whatever161710 жыл бұрын
cysteine and tyrone are hydrophobic
@mygoldentruth10 жыл бұрын
Lehninger refers to cysteine as polar, thus hydrophilic. But yes, tyrosine is actually nonpolar as far as I know.
@taniaahmed7054 жыл бұрын
👍
@RewanMho-zg8zw5 ай бұрын
من طرف محمود الصالح
@TrojansOwl17 жыл бұрын
Haterz 😂
@NewtonMD2 жыл бұрын
This is how to classify amino acids. Lol I can't memorize the actual 20 Amino acids
@jlg75616 жыл бұрын
I was expecting to hear Sal :[
@Karbonics1237 жыл бұрын
i nutted amino acids
@redwithstyle6 жыл бұрын
This video has an error. The amino acids that are basic are basic because the side chain Nitrogens have a lone pair that they can DONATE. It’s not willing to accept electrons and if it were it would be acidic.
@jedbom56469 жыл бұрын
Isn't Glycine hydrophilic and cysteine hydrophobic
@jsowels198 жыл бұрын
+j edbom looked it up and no glycine is non polar and hydrophobic cysteine is neutral and hydrophilic
@bamnitro66586 жыл бұрын
I love your voice but you say "and" wayyyyy toooooo muchhhh
@chainzss6 жыл бұрын
she sound cute af
@tumnekahakaise2215 жыл бұрын
She just didnt explain it right
@raynenaomi60103 жыл бұрын
The nutritious mint psychologically harass because korean unfortunately include pace a economic ray. enchanting, petite gear
@yoshimaster96324 жыл бұрын
Why does everyone teaching sound depressing af
@arohe47058 жыл бұрын
ur voice is bothering , I couldn't complete the video please try to change its tone
@sarahjanecleary18018 жыл бұрын
+danya aziz You cant change a teachers voice...
@arohe47058 жыл бұрын
she should try ,
@AlbertoAlencar8 жыл бұрын
hate her voice
@ouss9917 жыл бұрын
I think you should be thankful for the free education and shut the fuck up you ungrateful fucks.
@5Youssif7 жыл бұрын
love the response ha
@sarangshoro7864 жыл бұрын
Erotic voice, damn I ain't gonna listen to this in the library