A) They interact with the small subunit of the ribosome, which transport them out of the nuceus
B) They lack the cis-acting repressive sequences.
C) The exportin protein binds directly to the mRNAs to transport them.
D) The inportin protein binds directly to the mRNAs to transport them.
E) The HIV Rev protein is still required for their export, but it binds to the poly(A) tail instead of the RRE.

A) Acute transforming retroviruses
B) Nontransforming retroviruses
C) Alpharetroviruses
D) Lentiviruses
E) Spumaviruses

A) DC-SIGN
B) CD8
C) CCR5
D) CD4
E) CXCR4