IPhone 4 models. In fall 2010, pentalobe screws started to replace the Philips screws used in post-repair units in the US and in production units in Japan. The iPhone 4 shipped with iOS 4, which was the newest version of Apple's iOS mobile operating system at the time. iOS 4 introduced a multitasking system, allowing apps to remain "suspended" in memory, perform certain operations in the background, and allowing users to switch between apps using an on-screen menu. It also introduced FaceTime, which allows users to perform video calls between other iPhone, iPad, iPod Touch, and OS X users. The iPhone 4
JUNQ and IPOD the late onset of neurodegenerative diseases. In such diseases (e.g. Huntington's disease), a mutated protein misfolds and becomes toxic to the cellular environment by various ways such as denaturating cytosolic proteins. Incompetent of degrading those toxic species, the cell must isolate them to avoid their hazardous interaction with the cellular proteome. The IPOD was shown to be the sub-cellular site to which toxic amyloidogenic proteins are sequestered to, hereby serving as a protective quality control compartment. In addition, it was suggested by the Lindquist group, that the IPOD is the site where yeast prions undergo a maturation process. Thus, the