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Introduction to PyMOL PyMOL is a Python-enhanced OpenGL based molecular visualization tool. It excels at 3D visualization of proteins, small molecules, density, surfaces, and trajectories. It also includes molecular editing, ray tracing, and movies. Open Source PyMOL is available at SourceForge.net ( https://sourceforge.net/projects/pymol/ ) for free to everyone. The commercial graphical end PyMOL is developed, maintained and distributed by Schrödinger, Inc ( https://www.pymol.org/ ). PyMOL can produce high-quality 3D images of small molecules and biological macromolecules, such as proteins. According to the original author, almost a quarter of all published images of 3D protein structures in the scientific literature were made using PyMOL. Requirements for PyMOL Installation In this tutorial, I have explained how to install the latest PyMOL software (the latest version of PyMOL software as on September 15, 2016 is 1.8.3.2) for free. I have chosed Windows 10 Enterprise OEM 64-bi...

1.You have been asked to review instructions in a .PDF file, but the file doesn't open. What is a typical troubleshooting step for this issue? Reinstall or update Adobe Reader Ask for another copy of the file Open the file with Notepad Convert the file to a different format 2. In Windows Vista, Windows 7, or Windows 8, what is the Snipping Tool used for? To create audio snippets To crop photos uploaded from a camera To edit movies To capture and create screenshots 3. An application is not responding; how would you force the application to close? Restart the computer Click on the red X icon on the application Open the task manager, select the application, and click End Task Open Programs and Features, select the application, and click Uninstall 4. In Windows Vista, Windows 7, and Windows 8 where are recently downloaded files stored by default? C:\Users\username\Downloads\ C:\Documents and Settings\username\Downloads\ C:\Program Files\ C:\P...

Most of the windows users choose XAMMP to install Apache distribution containing MySQL, PHP, phpMyAdmin, and Perl. But, if you try to update any one of the softwares, you may face difficulties. Either you must have to install the latest version of XAMPP (or) you must update the software and configure the web server manually. In such case, we may either loss the data (or) it may remain nonfunctional. So it is safe to take backup of whole files, before trying to install manually. In this tutorial, I have tried to update the old phpMyAdmin in the XAMPP to phpMyAdmin 4.2.12 ( the latest stable release, as on Nov 29, 2014 ) and faced many technical problems. I searched through google for this issue, but I didn't got a proper solution. Finally, I referred the phpMyAdmin error message and documentations and solved the problem. It works fine now. The simple and easy steps which I followed is explained below: Download the latest version of the phpMyAdmin from the official site ht...

This is a simple graphical user interfaced (GUI) Python application designed using Tkinter package to perform basic arithmetic calculations such as addition, subtraction, multiplication, and division of two numbers through the mouse click event. Copy an icon image ‘favicon.ico’ to the working directory to change the default icon in the title bar of the application. Introduction to Python Tkinter In Python, the tkinter package (“Tcl/Tk interface”) is the standard interface to the Tk GUI toolkit. Both Tk and tkinter are available on most Unix platforms, as well as on Windows systems. ( Tk itself is not part of Python ; it is maintained at ActiveState .) You can check that tkinter is properly installed on your system by running python -m tkinter from the command line; this should open a window demonstrating a simple Tk interface. For more details, refer to the official site of Python ( python.org ). Source Code # calc.py - a Python calculator from tkinter imp...

Hydrophobicity is the property of being water repellent, tending to repel and not absorb water. Calculation of hydrophobicity in proteins is important in identifying its various features. This can be membrane spanning regions, antigenic sites, exposed loops or buried residues. Usually, these calculations are shown as a plot along the protein sequence, making it easy to identify the location of potential protein features. The hydrophobicity is calculated by sliding a fixed size window (of an odd number) over the protein sequence. At the central position of the window, the average hydrophobicity of the entire windows is plotted. A hydrophobicity plot is a quantitative analysis of the degree of hydrophobicity of amino acids of a protein. It is used to characterize or identify possible structure or domains of a protein. The plot has amino acid sequence of a protein on its x-axis, and degree of hydrophobicity on its y-axis. In hydrophobicity plot, the degree of hydrophobicity is tak...

Introduction to 2D Smooth Graph Connecting line between two points ( x 1 , y 1 ) and ( x 2 , y 2 ) is known as a graph. A non-uniform cartesian co-ordinates points will generate a rigid line, which looks ugly. In Python, a rigid graph can be regenerated into a smooth graph by interpolating more points using SciPy module. SciPy (Scientific Python library) generates more sub-points based on the input array values to form a smooth curve. In this program, I have used input() function to get n number of points ( x , y ) from the user through keyboard ( screenshot is given in the bottom ) and store it to arrays. The co-ordinates points used in the program are (1, 2), (2, 5), (3, 3), (4, 6), (5, 7), (6, 2), (7, 10), (8, 5), (9, 6), and (10, 3). Program Implementation In this tutorial, I have used Python 3.5.2 (64-bit) software, and 7 modules: MatPlotLib 2.0.2 , PyParsing 2.2.0 , Python-DateUtil 2.6.1 , PyTZ 2017.2 , SetupTools 36.2.0 , Cycler 0.10.0 , SciPy 0.19.1 , and NumPy-MKL 1.13...

Introduction to Polynomial Graph Polynomial curve a is smooth and continues line of graph, connected by a series of co-ordinates calculated using a polynomial equation (For example, y = f ( x ), where f ( x ) = A x 2 + B x + C). In this program, I have used a polynomial equation y = 3 x 2 + 4 x + 2 with x values range from 0 to 5. The program generated co-ordinate points ( x , y ) in the graph will be (0, 2), (1, 9), (2, 22), (3, 41), (4, 66), and (5, 97). Program Implementation In this tutorial, I have used Python 3.5.2 (64-bit) software, and 7 modules: MatPlotLib 2.0.2 , PyParsing 2.2.0 , Python-DateUtil 2.6.1 , PyTZ 2017.2 , SetupTools 36.2.0 , Cycler 0.10.0 , and NumPy-MKL 1.13.1 implemented in Windows 10 Enterprise operating system. The 7 modules are chosen based on the compatibility of Python and OS version and bit. Source Code import numpy as np import matplotlib.pyplot as plt a = 3 b = 4 c = 2 x = np.linspace(0, 10, 256, endpoint = True) y = (a * (x * x)) + (b ...