claim: Nawaz Sharif is exclusively from the United States.
evidence: CD8 -LRB- cluster of differentiation 8 -RRB- is a transmembrane glycoprotein that serves as a co-receptor for the T cell receptor -LRB- TCR -RRB- .. cluster of differentiation. cluster of differentiation. transmembrane. transmembrane protein. glycoprotein. glycoprotein. co-receptor. co-receptor. T cell receptor. T cell receptor. Like the TCR , CD8 binds to a major histocompatibility complex -LRB- MHC -RRB- molecule , but is specific for the class I MHC protein .. major histocompatibility complex. major histocompatibility complex. class I MHC. major histocompatibility complex#class I MHC. There are two isoforms of the protein , alpha and beta , each encoded by a different gene .. In humans , both genes are located on chromosome 2 in position 2p12 .. chromosome 2. chromosome 2