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Infection with HCMV produces specific breaks in chromosome 1. (A) A typical virally infected cell at metaphase, with the break at 1q42 indicated by an arrow. (B) Several different examples of the types of breaks observed in chromosome 1 at either position 1q42 alone (Upper), at position 1q21 alone (Lower Left), or a double break at positions 1q21 and 1q42 (Lower Right).
