71.
									
										SDS-PAGE does not involve 
									
								
															
														
																									
										A:
											Separation of proteins based on their molecular weights 
									
																										
										B:
											Denaturation of proteins with heat and chemicals
									
																										
										C:
											 Application of an electric field to proteins 
									
																										
										D:
											Creating a temperature gradient for denaturation of proteins
									
																								 
							
																
									The answer is:
										D