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To determine whether varied quantitative HLA expression affects the susceptibility of target cells to CTLs, a panel of 15 EBV-transformed lymphoblastoid cell lines expressing a fivefold difference of surface HLA-A2.1 antigens were employed. The susceptibility of these cell lines to HLA-A2.1-restricted and influenza virus matrix peptide-specific CTLs was correlated with the amounts of HLA-A2.1 antigens...
X-irradiation of KCl:Eu2+ at room temperature destroyed impurity-vacancy (I-V) dipoles, converted the doubly-valent impurity ion to a singly-valent state, and created defect centers, e.g. F-centers and a 220 nm optical absorption band. Eu+ produced by the irradiation was observed to grow in proportion to the destruction of The 220 nm band was also observed to grow approximately in proportion to the...
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