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Marana Community Correctional Treatment Facility (MCCTF) is one of 13 prison facilities in Arizona housing prisoners of the Arizona Department of Corrections (ADC). The facility is located in Marana , Pima County , Arizona , approximately 100 miles south of Phoenix, Arizona .
B7 is a type of integral membrane protein found on activated antigen-presenting cells (APC) that, when paired with either a CD28 or CD152 surface protein on a T cell, can produce a costimulatory signal or a coinhibitory signal to enhance or decrease the activity of a MHC-TCR signal between the APC and the T cell, respectively.