You are the reason I received an A in Biochemistry, and now you will help me in Advanced Molecular Bio. I cannot thank you enough, you are amazing. Thank you immensely, signed a PhD student who had forgotten her previous undergrad biochem/molecular knowledge.
YOU "understand" the materials that you are presenting while at the same time spreading that understanding to your audiences. Your knowledge is so contagious. I adore so so so much! Thank you.
Feedback: Would of been nice to include some of the types of intermediate filament proteins e.g. desmin and keratin found in muscle and epithelia, respectively. Also, I think the definition of cytoplasmic streaming is a little off. Other than that man, a very clear and well thought out explanation. Keep up the great work! :-)
Microtubule design is likely intended for much more than strength. Hollow shapes are more efficient in providing bending strength and torsion resistance. Bending strength is really what provides greater compression & carrying capacity as a column in direct compression. Long columns don’t fail in compression. They fail in bending. And, when considering eukaryotic flagella, it makes more sense to view the microtubule as a superior design for bending as opposed to compression strength. Peace. (Edit: I’m a structural engineer.)
Thank you so much, AK Lectures. Your way of describing things are very much engaging. And trust me it helped me a lot during my masters semesters. Keep up the good work. :)
Does the 23nm width of the microtubules refer to the width of the tubes or the fiber that coils to make up the tube? If the later, how wide are the tubes? Does the width vary?
