Fig. 1.

IBAV cores and IBAV core transcripts. (A) Purified IBAV virus (left panel) and IBAV core (right panel) particles stained with 2% uranyl acetate and observed by electron microscopy. The bar represents 100 nm. (B) IBAV virus and core particles purified from BSR cells were resolved by SDS–PAGE. The position of each structural protein is indicated on the left. (C) Profile of IBAV core transcripts (lane mRNA) analyzed by denaturing 1% agarose gel. The numbers on the left indicate the lengths of the marker (lane M) bands in nucleotides. The position of each segment is indicated on the right.