Fig. 2.

Immunogold localisation of SR proteins and PANA antigen. a Gold particles reveal that SR proteins mostly occurred in interchromatin granules (IG), as well as in the perichromatin region (arrowheads) and the interchromatin space of A. cepa nuclei. b Condensed chromatin (Ch) and Cajal bodies (CB) are devoid of gold grains. c A similar SR protein distribution pattern was observed in L. luteus. d, e After staining with anti-PANA antigen, gold particles were mainly observed in the interchromatin granules of Allium cepa (d) and Lupinus luteus (e). PCh perichromatin area, IG interchromatin granules, Ch condensed chromatin, Nu nucleolus, CB Cajal body. Bar 200 nm