Immunoprecipitation (IP). Immunoprecipitation (IP) is the small-scale affinity purification of antigens using a specific antibody and is one of the most widely used methods for antigen purification and detection.This approach enables researchers to: 1  identify the activation status of proteins. 2  determine post-translational protein modifications.hromatin immunoprecipitation (ChIP) assays are performed to identify regions of the genome with which DNA-binding proteins, such as transcription factors and histones, associate. In ChIP assays, proteins bound to DNA are temporarily crosslinked and the DNA is sheared prior to cell lysis.
A semester divides the school year into two equal parts. This means that if the academic year is 32 weeks, each semester is 16 weeks long. In different countries, in different â¦ colleges and universities, the academic year has no standard, so the length may vary. community college semester lasts roughly 4.5 months. This will  vary depending on how long each specific college allows for  Christmas break and New Years break.
If you choose to send the free score reports at the test center, schools will receive your official score report the same time you do, 10-15 days after you take the GRE. If you choose not to send scores at the test center, youâll have to wait until you receive your official scores until you can send any reports. GRE scores are valid for five years. If you choose to send score reports at a later time, after youâve received your official scores, schools will receive the report about five business days after you place the order.