Secondary Structure of Proteins 

"and what that means is..." so beautiful. thank you.

the amount of respect I have for just being able to draw out alpha helix, with detail and legibility. its beyond me

Your videos are sick bro. Making this biochem significantly easier... summing 2 hour conversations into 14 mins. Thanks

Omg these lectures are flawless I literally wanna cry from happiness. it’s been 8 years since they have been published but the best lectures I have ever watched

These Videos were post/published almost 2 years ago and am here enjoying every part of em...Biochemistry seemed so tough but now i feel like all i needed was to take a glimpse at these videos and thats was it...Thank you AK LECTURE your knowledge via is really more than helpful..

Some more additional information: β-turns often consist of Glycine which provides flexibility and Proline, which provides steric constraints.

"wow, this is a H, not a N" 😂😂😂 13:26

6 years ago they were posted and still they are mesmerising.....you are god gifted mateeeee❤

Thanks so much for all your lectures!!!!you should come to our university!!!you make biochemistry so easy and i appreciate your hard work and the way you structure your lectures in a way that everyone can understand!!!!!!!keep up the good work!!!

The best videos I have ever watched. Thank you for these wonderful explanations. Could you please explain omega loop as well? Kind Regards

Your videos are absolutely amazing !! thank you so much for all of them

You r one of the best teacher for me to come across . A great job and thus a great apreciation Bt where r u now ? No more uploads !?

Am grateful for these free services.Biochemistry is now very easy for me. God bless and I hope to make a reasonable donation of this good course someday.Thanks and more strength

i listen ur lecture it help me a lot in my exams ur way of teactng is awesome ...ii enjoy ur lecture it deeply penetrate in my mind thnx AK LECTUREs :)

You're excellent, 4 years back I used to learn modern physics from ak lectures Now as a medical student learning biochem You are so versatile

I swear this finally makes sense! thanks so much!!!!

I feel like you just saved me so many hours of studying the long poorly worded book to understand what you just taught me in 10 minutes (thanks to 1.5 speed haha). You are awesome!!!!!

Sir, Thank you so much!! I have my biochemistry exam tomorrow and I rely on your videos to do well on it.

2022 and you taught me more than my prof in university. thank u so much !!

Nicely explained men . You have explained the basic compositions of structure . It's good for me

Very well explained sir. Clear explanation. You are a true inspiration....

Thanks so much for making everything easier to understand!

Your explanation unbelievable!!

The efforts and the way of teaching is so frickin sick, prof! I have accepted the fact that most of the teachers have knowledge but they cannot convey it properly Except some who are god gifted like you❤

this video was published when i was in 5th grade, and now, im a 1st yr college student who you just saved. tysmm

you explain in such a nice way that it makes me so easy to understand

13:26 that wow described my whole process of learning from this video 😂 Thank you soo much 💕

The R groups on the anti parallel lower chain have their chirality reversed (wedges should be dashes, and vice versa).

very good video thanks for the amount of detail and effort!

kudos!!! Thank you so much for explaining everything in such detail

clear explanation starting from basics thank you !

You go so much more in depth with these topics than my teacher, that I dont have to keep constantly asking myself "why does this happen" or "we seem a bit short on notes." Thanks for this :)

love you lectures so much. you make things simple and easy to understand. i was wondering what references you use for this topic? hope i get a reply from you :)

i Don't know how i express my greatfullness. thanks a lot sir.

Helpful stuff. But you didn't talk about omega loops :(

Thank you a lot ...the way you explain even a new born baby can even understand

Amazing thank you thank you from the bottom of my brain!

you are awesome, so easy to understand

You make it too easy! thank you thank you and one more thank you

That's one hell of a drawing. Huge props for that Helix

Your videos are really good. I understand everything better, when you explain it, even though I am from Austria and a native german speaker. You should teach at my University of Pharmacy :-)

thank you for the lecture, make me understand easily.. by the way, can u explain the omega loop structure too?

A left-handed α-helix results in steric hindrance between the side chains and the C=O groups from the amide/peptide bonds.

Just awesome . Thank you a lot..

A question, if the formation of a-helices and b-sheets depend exclusively on the H-bonds of the polypeptide backbone, and not on the side chains (which are variable), what does determine if an a-helix or b-sheet will take place? Because the N-H and C=O of the backbone will always be the same! You are a great teacher, thanks!

beautiful explanation!

Amazing lectures!

excellent review videos for MCAT biochem, thank you

You r doing a great job

thank you a lot.. its really helpful....

Your explanation is something beyoooonnnnddd!!!!

love your videos!

Спасибо! Довольно доступно все объяснено)

Give that man a cookie

Extraordinary teaching 🤩

you are an excellent teacher

You are amazing sir,hats-off

Thank you!

Awesome lecture 👌

THANK YOU!

Literally u r awesome sir🤩🤩 May god bless u always 🙌🙌🙌 U explain each and every concept very smoothly 🤍🤍

I'm confused, question: "The peptide bonds have a double bond character" but I noticed all the drawings of the C-N bond appear as a single bond, is this "character" you're speaking of indicatory of a resonance occuring between the C=O double bond and the C-N bond? Thus causing it to have another double bond character as to not freely rotate? Tyvm! Excellent...really excellent lectures btw. Liked & subscribed.

Thank you thank you thank you !!!

Thank you sir,it was so helpful for me 🤗

Reallly helpful,Thanks

Thank you so much. Made more sense than my lecturer. I'm a med student.......

you are just woww evenn... keep it up, do a series on organic chemistry maybe

Thank you for the greattt explanation..

great! but i just want to know what is the difference between (loop region - beta turns - disordered region( ??

Thanks so much!!!

You’re amazing!

good work thanks

you are so good like really good lmaooo this is insane! im taking my money back from my teacher because i only learn from you

sir your lectures are amazing. I also request you to make a video on Ramachandran plot.

Thank you so much, you're a lifesaver!

amazing lecture

No se como hace, pero hace que in tema que parecia inabordable, parezca fácil. Creia que si no tenía una computadora de última generación, jamás lo iba a poder entender... Congratulations!!!

Good lecture bro, i have a question. can you show right handed and left handed cross over connection in parallel beta sheet. i have a doubt in understanding why the images in books look opposite ( i mean the right handed one looks left hand to me, I think i am interpreting those images wrongly)

Perfect 👍🏻

Awesome! Thanks!

Is the beta sheet consist of more than one peptide/polypeptide chain and beta turns connected them to result in a one polypeptide chain? or it is one polypeptide chain and the side that turns it called beta turns?

Thank you so much

The notes on the board are so crisp I didn't even need to watch the whole video to understand!

Thank you

Hello professor..I am Marchela-a chemistry student. I would like to ask some questions. 1. How to know the end of alpha -helix or beta sheet structure in protein? 2. What is the impact of having short loop and long loop in secondary protein and in which kind of protein that has long or short loop? Thank you for you responbility

والله كفو, احسن من د نبيل تبعنا

fantastic

Thank you🫡 شكرا

I could not understand how the parallel beta sheet amino acid residues of polypeptide sheet form two hydrogen bonds with the amino acid of the opposite chain. Please elucidate further Waiting for an answer :D

Beta paleted structure is composed by alpha helix or directly?

i've my phD proficiency exam tomorrow and i'was prepared with your amazing videos. wish me luck:)

sir you are a great keep it up

Is there a list of amino acid sequences organized into the two main categories: 1. Alpha helix 2. Beta-pleated sheet? I recently made a program that randomly generates an amino acid sequence. The program stops when a stop codon is generated. That is, there's a 3/64 the program will stop after each amino acid is generated. However, I'm unable to find the necessary information to create a program of perfect information for the secondary structure.

seriously sir....ur lectures are awesome

Thank you so much Sir ❤️

thanks...😍

You haven't explained 4th type of secondary structure

Do you have a video on super secondary, and phi, psi, omega bondage?

Thank you sir

So damn good teacher.