this preparation was devoid of previously identified nuclear antigens including ribonucleoprotein ( u1-rnp ) , proliferating cell nuclear antigen ( pcna ) , sjogren 's syndrome antigen a ( ss-a/ro ) , sjogren 's syndrome antigen b ( ss-b/la ) , sjogren 's lupus antigen ( sl ) , scleroderma antigen 70 ( scl-70 ) , dna and histones .
C0069115
nuclear
C0003320
antigen