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Cell membrane proteins | Cells | MCAT | Khan Academy

Оценок: 2047 | Просмотров: 333759
Learn about the different types of proteins that exist on the cell membrane. By William Tsai. Created by William Tsai. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/cells/cell-membrane-overview/v/cell-membrane-fluidity?utm_source=YT&utm_medium=Desc&utm_campaign=mcat Missed the previous lesson? https://www.khanacademy.org/test-prep/mcat/cells/cell-membrane-overview/v/cell-membrane-overview-fluid-mosaic-model?utm_source=YT&utm_medium=Desc&utm_campaign=mcat MCAT on Khan Academy: Go ahead and practice some passage-based questions! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s MCAT channel: https://www.youtube.com/channel/UCDkK5wqSuwDlJ3_nl3rgdiQ?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
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Текстовые комментарии (111)
Open World (14 дней назад)
Great video!!! But I don't think carbonhydrates are also located at the interior side of the membrane, or am I wrong? It wouldn't make sense to locate carbonhydrates on this side, since there are no cells to interact with
Nuha Albeldawi (19 дней назад)
Wher is lipid anchored protein ? Thank you for this amazing video 😊😍
Gnp Gnp (1 месяц назад)
What is translation of ribosomes?
rawan dahhan (1 месяц назад)
Thank youu
Majdolone Majdal (2 месяца назад)
thank you
Saba Butt (2 месяца назад)
It means thats cell membrane contains 6 types of protiens ? Im little bit confuse plz answer me.U explained very well ❣️
Rahaf Almobarak (2 месяца назад)
My life saver
Tai Yo (2 месяца назад)
You just saved me... THANK YOU 😭😭👌
Mohamed Tarek (2 месяца назад)
Is there all the type of proteins in one membrane
Shaguftha Haider (2 месяца назад)
Dammnn his method of explanation is so smooth and understanding. Every word he says just just gets in my head within seconds! He's truly my carrier protein. haha
Muna Haroun (3 месяца назад)
awesome video!!
Adalina Gutierrez (4 месяца назад)
Excellent explanation!
ww Ayaka (4 месяца назад)
Awesome explainations! Easy to understand, it really helps a lot, thanks!!:333
Nonono (5 месяцев назад)
Are channel proteins and carrier proteins also integral proteins?
Jubaer Al-Amin (4 месяца назад)
Santo 3.1416 (6 месяцев назад)
khan academy my question is how the signaling glycoprotein communicate to each other?
Andres Mendoza (7 месяцев назад)
Glycoproteins are only found on the side of the extracellular matrix not in the cytosol.
Talk About It (8 месяцев назад)
jojo SY (9 месяцев назад)
WooOOw very GOOD :)))
Jubilee Mortera (10 месяцев назад)
tamara alazzeh (11 месяцев назад)
but i think you should not put a carbohydrate portion in the inner protein .. is it or not ?
Subham's Creation (11 месяцев назад)
U are d best
ch1q elias (1 год назад)
you are genius !
Gültekin Akay (1 год назад)
Excellent lectures, thank you! Anyone knows the software and hardware they are using to write on the screen and prepare these lectures? It is a very effective software I want to adopt it.
Ana Maria Rusu (1 год назад)
Thank you! Really useful.
Phillip Baek (1 год назад)
Wait, in my textbook, it says that are are passive transport proteins (no ATP) and active transport protein (uses ATP), so is the passive transport protein basically channel protein and active transport protein carrier protein?
Langhuong Eap (1 год назад)
Please help us more in biology
Stephen Price (1 год назад)
Is integral protein the same as transmembrane proteins?
thefashionluvbug (1 год назад)
I finally understood this. After watching 100000000 other videos on this by different people, your video actually helped me understand this all. Thank you so much! I feel more confident for my test on Saturday :)
Deidra Taylor (1 год назад)
this was really good thanks
Faiza MuhammadJawaid (1 год назад)
Channel protein responsible for the moment of ions against the concentration gradient not down the concentration gradient.
random name (1 год назад)
And cotransporters are channel proteins I think.
random name (1 год назад)
No. Channel proteins facilitate ONLY passive diffusion for specific substances such as ions, and other relatively large polar molecules. This makes sense because most, or maybe (all), of the time, channel proteins have a hollow tube-like structure which allows the passage of different substances down their respective concentration gradient. BUT (though I'm not very sure), other transport proteins such as cotransporters use the indirect pass of energy(ATP), which is the potential energy released when molecules such as ions move down their concentration gradient, by a nearby active transport pump to allow the passage of certain molecules against their concetration gradient.
Robert Lim (1 год назад)
You solve my confusion
Logic Mlotshwa (1 год назад)
Ana T (1 год назад)
Wouldn't the carbohydrates (glycoproteins) only be located on the outer surface of the cell? I noticed you drew them on both leaves of the membrane. Thank you.
Open World (14 дней назад)
Yes I thought the same thing, I think carbonhydrates only appear on the outher surface of the membrane because they function as signalling proteins, so it would make no sense if they were located also at the interior side of the membrane, since there are no cells to interact with at this side
Shehnaaz Firdous (1 год назад)
you kinda missed cholestrol
Mo Paj (1 год назад)
Hey, amazing video. Explained it better than my lecturers. I'm trying to understand the GPI Anchor in a basic sense but cannot get my head around it. Would it be possible to give a brief description of what it is and how it works please? Thanks in advance! x
MEGHAN DAVID (1 год назад)
hey what about transmembrane you didn't happen to mention it
The AmAziNG (1 год назад)
its the same thing as integral protein
Fakhri Hakim (1 год назад)
excuse me but carrier proteins don't need ATP they transport substances through facilitated diffusion can you explain more about that coz this got me confused
Kalam Rashid (1 год назад)
Fakhri Hakim Wassup, basically carrier proteins are the only proteins that can use ATP for active transport (the correct term that is missing in the video) meaning it can transport molecules AGAINST the concentration gradient unlike channel proteins. However, if the molecules that needs to be transported from the outside of cell to the inside follows the concentration gradient (from high to low) then facilitated diffusion occurs.
Veeresh Kumar (2 года назад)
Neta Burnum (2 года назад)
The classical Yeast two-hybrid (Y2H) screening is mostly limited to the study of cytosolic or extracellular soluble #proteins. To study the interaction of transmembrane protein interaction, #Profacgen provides a specialized membrane-based Y2H (#MbY2H) system. Visit http://www.profacgen.com/membrane-based-yeast-two-hybrid-screening.htm to know more!
RIVULETI (2 года назад)
😍😍😍 thank yooou
Dhriti Paul (2 года назад)
whats the software used here?
Angela Arias (2 года назад)
I wish you were my bio teacher :(
Isaiah Ajueny (2 года назад)
Thanks ,I now get it.
divine complexions (2 года назад)
TupolevPilot (2 года назад)
what's a tethered protein?
Muaaz Iqbal (2 года назад)
Johnny Neville (2 года назад)
thank you this was very helpful.
Jaka.Keete (2 года назад)
Bra this really helped. God Bless you for blessing us with this video.
Irina Grigoryan (2 года назад)
Thank you so much!
Pensandnoodles (2 года назад)
it all makes sense now!! thank you :)
hawt nurse (2 года назад)
Very helpful thx!
sarishma sari (2 года назад)
awesome thank you somuch
aditi mishra (2 года назад)
It's very easy to understand just because of the way you are teaching. Thank you..
anonymous 000000 (2 года назад)
thanx these videos are really helpful
T Rosa (2 года назад)
great presentation! videos are my secret weapon to get good grades. thanks
Joyce Li (2 года назад)
love this video!!!!! it is extremely helpful for me to do my project about cell membrane proteins!!!
Tayo (2 года назад)
what is it protecting it from 530 pls. do carrier protiens use atp going both ways, or just one and how do they not use atp and when do they not use atp. i am curious
Parul Aggarwal (2 года назад)
These videos are much better than my Biology teacher....☺😊
Hajar (2 года назад)
Come to my university and teach me biology .. 😢💔 my professor is so bad
Gloria Ha. (2 года назад)
Perfect thanks
Veronica Noordzee (3 месяца назад)
Almost ;-)
Solonaz2 M (2 года назад)
Thank you so much
khadim hussain Sapu (2 года назад)
wavv ... first of all I wana say thank you soo much sir from ma core of heart   for teach us a topic in such an outstanding... I wish u were in our college....!!
Default ¿ (2 года назад)
Janjay Spike (2 года назад)
teach 500% better than my horrible professor
Affan khattak (7 месяцев назад)
Janjay Spike . dont say horrible to your professor
Romeo Hussain Hussain (1 год назад)
Luna Rumba Tamang
Luna Rumba Tamang (2 года назад)
+Janjay Spike Same!
Cross Roads Productions (2 года назад)
You're a real humane being!
hano jo (2 года назад)
Thanx 😊
Blinzler Main (3 года назад)
It is a little confusing that there is a glycosylated peripheral protein drawn on the inside of the cell (the lower layer of the mebrane). There doesn`t exist any glycosylation towards the cytoplasm.
Gurveen Chawla (3 года назад)
what kind of cell to cell interactions are being carried out by glycoproteins?
Gurveen Chawla (3 года назад)
would really like to advise u one thing, always give a significance/ importance of each and everything you are presenting in the vedio. like..what is the significance of lipid bound protein, why it is present there, theremust be some reason
Tayo (2 года назад)
+Gurveen Chawla captain here, hope im not to late. Its used to strengthen the wall and make it more durable. Im not sure what else though.
Olivia Frazier (3 года назад)
Makes so much sense now! Thank you.
Qusai Aljabal (3 года назад)
Khanacademy saves our lives from boring and stupid professors/ teachers. THANK YOU Mr. Salman Khan.. Without ur help Me and Many others would have done worse in our Exams.
TOXIC (6 месяцев назад)
Qusai Aljabal don't call your teacher's and professor's stupid
Elisa Han (3 года назад)
thank you so much for these videos! Extremely helpful :)
Elaibe Law (3 года назад)
Thanks a lot(≧∇≦) My teacher always say too fast and i sometimes can't follow it.also,i want to ask what is ATP🙋
Elaibe Law (3 года назад)
+K Yuh thanks
K Yuh (3 года назад)
+Elaibe Law Adenosine triphosphate, essentially the energy currency of cells. It helps power certain cell processes through its hydrolysis (addition of a water molecule to break one of the phosphate bonds, thus releasing the energy stored in that bond), creating ADP (adenosine diphosphate) and Phosphate as a result.
Zahida Ahmad (3 года назад)
Thanks, best effort.
mary aa (3 года назад)
You're the best ! Thankyou
Stacia Walker (3 года назад)
amazing video! thank you so much
Ikram Ghz (3 года назад)
OMG! Thank youu so much. It helped me to understand my studies, i have BAC and i think this will help me in my exam 😍😍😍😍
retaj fares (3 года назад)
recording (3 года назад)
thanks a lot
atyn hyun (3 года назад)
thanks dude!
Sara Ahmad (3 года назад)
Thank you so much, it’s really helps ! 
Mohammed (3 года назад)
you are the best 
Abigail Goo (3 года назад)
Are lipid-anchored proteins the same as lipid-bound?
Veronica Noordzee (3 месяца назад)
What is an anchor good for? To bound a ship to it's location.
Abigail Goo (3 года назад)
I thought peripheral proteins do not touch the hydrophobic layer?
K Yuh (3 года назад)
+Abigail Goo he shows them bound to the hydrophilic heads
Monkey D. Luffy (3 года назад)
They don't. Peripheral obviously means outside, and the hydrophobic layer is inside. 
Zonish Baloch (4 года назад)
This video was so helpful.Thank you much! i have been struggling with this topic so much and mixing functions of all the these proteins but your very organised video cleared away all the doubts. :)
*Caught up af in my feelings again* (4 года назад)
yay! thank you! (:
superstar1732 (4 года назад)
you should have talked about how to remove peripheral, integral, and GPI proteins from the membrane like using detergents or increasing ionic strength, etc.
Hannah J (4 года назад)
Thank you a lot :)
Hussein Zuhair (4 года назад)
David Mansaray (4 года назад)
Great work!
Brone (4 года назад)
Habib Ul Wahab (4 года назад)
thank alot great effort ......................
orlando rivera (4 года назад)
what are some types/names of peripheral and integral proteins??
Sally Li (5 лет назад)
thank you

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