52-kD SS-A/Ro: genomic structure and identification of an alternatively spliced transcript encoding a novel leucine zipper-minus autoantigen expressed in fetal and adult heart Chan, E.K.; Di Donato, F.; Hamel, J.C.; Tseng, C.E.; Buyon, J.P. Journal of Experimental Medicine 182(4): 983-992 1995 0022-1007 10.1084/jem.182.4.983 https://eurekamag.com/research/008/017/008017755.php