Shortened long-term survival of incompatible red cells in a patient with anti-McCoy-like antibody. Immunoglobulin characteristics of this antibody

Abstract
The long-term survival of incompatible 51Cr-labeled red cells in a patient with a high titer, low avidity antibody of anti-McCoy-like specificity was decreased (half-life = 14 days), although the 24-h survival was normal (91.9%). This antibody was composed of IgA and IgG, the latter consisting of subclasses 1, 3 and 4.