A polyproline helix is a type of protein secondary structure which occurs in proteins comprising repeating proline residues. A left-handed polyproline II helix (PPII, poly-Pro II) is formed when sequential residues all adopt (φ,ψ) backbone dihedral angles of roughly (-75°, 150°) and have trans isomers of their peptide bonds. This PPII conformation is also common in proteins and polypeptides with other amino acids apart from proline. Similarly, a more compact right-handed polyproline I helix (PPI, poly-Pro I) is formed when sequential residues all adopt (φ,ψ) backbone dihedral angles of roughly (-75°, 160°) and have cis isomers of their peptide bonds. Of the twenty common naturally occurring amino acids, only proline is likely to adopt the cis isomer of the peptide bond, specifically the X-Pro peptide bond; steric and electronic factors heavily favor the trans isomer in most other peptide bonds. However, peptide bonds that replace proline with another N-substituted amino acid (such as sarcosine) are also likely to adopt the cis isomer. (Wikipedia).
Introduction to Chemical Biology 128. Lecture 18. Terpenes and Cell Signaling, Part 2
UCI Chem 128 Introduction to Chemical Biology (Winter 2013) Lec 18. Introduction to Chemical Biology -- Terpenes and Cell Signaling -- Part 2 View the complete course: http://ocw.uci.edu/courses/chem_128_introduction_to_chemical_biology.html Instructor: Gregory Weiss, Ph.D. License: Creat
From playlist Chem 128: Intro to Chem Biology
What are the names of different types of polygons based on the number of sides
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
What is the difference between convex and concave
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
What is a polygon and what is a non example of a one
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
What is the definition of a regular polygon and how do you find the interior angles
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
What are four types of polygons
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
What is the difference between convex and concave polygons
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
Helix 🧬 the Rust Powered Development Environment
A quick tour of the Helix text editor / development environment, which is written in Rust. It's very similar to vim, but removes a substantial amount of configuration complexity and takes a slightly different approach with ergonomics. 00:00 Helix Intro 01:10 Themes 01:30 Modes 01:42 Openi
From playlist Great Rust Videos
Lec 4 | MIT 7.012 Introduction to Biology, Fall 2004
Biochemistry 3 (Prof. Robert A. Weinberg) View the complete course: http://ocw.mit.edu/7-012F04 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 7.012 Introduction to Biology, Fall 2004
ANATOMY FOR ARTISTS: Ear Anatomy Part 1
Marc describes and draws the location, shape/form, and relevant anatomy of the ear in Part 1. Part 2 is for Living Anatomy practice.
From playlist ANATOMY FOR ARTISTS
Alenka Copic - Targeting of a model amphipathic helix to lipid droplets
Lipid droplets (LDs) are dynamic organelles that play an essential role in cellular lipid homeostasis and are implicated in many human pathologies (obesity, diabetes, cancer, etc.); however, the mechanisms of selective protein targeting to LDs to mediate their
From playlist From Molecules and Cells to Human Health : Ideas and concepts
eCSi Incident response and computer forensics tools
https://linktr.ee/CharlesTendell Charles Tendell gives a Brief tour of helix v3 by Efense Incident response, ediscovery & computer forensics tool kit for more information and to download your copy of helix visit http://www.efense.com/helix http://www.forensicswiki.org/index.php?title=Hel
From playlist digital forensics
Lec 3 | MIT 7.014 Introductory Biology, Spring 2005
Biochemistry II (Prof. Graham Walker) View the complete course: http://ocw.mit.edu/7-014S05 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 7.014 Introductory Biology, Spring 2005
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
6. Seeing Bonds by Electron Difference Density
Freshman Organic Chemistry (CHEM 125) Professor McBride uses a hexagonal "benzene" pattern and Franklin's X-ray pattern of DNA, to continue his discussion of X-ray crystallography by explaining how a diffraction pattern in "reciprocal space" relates to the distribution of electrons in mol
From playlist Freshman Organic Chemistry with J. Michael McBride
Spontaneous helix formation in semiflexible polymers without confinement... by Apratim Chatterje
DISCUSSION MEETING : 7TH INDIAN STATISTICAL PHYSICS COMMUNITY MEETING ORGANIZERS : Ranjini Bandyopadhyay, Abhishek Dhar, Kavita Jain, Rahul Pandit, Sanjib Sabhapandit, Samriddhi Sankar Ray and Prerna Sharma DATE : 19 February 2020 to 21 February 2020 VENUE : Ramanujan Lecture Hall, ICTS
From playlist 7th Indian Statistical Physics Community Meeting 2020
Classifying a polygon in two different ways ex 4
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons