id	keyword
afs-5643	et al
afs-5643	virus
afs-5643	resistance
afs-5643	transgenic
afs-5643	potato
afs-5643	pvy
afs-5643	plants
afs-5643	gene
afs-5643	protein
afs-5643	rna
afs-5643	n d
afs-5643	tobacco
afs-5643	potato virus
afs-5643	virus resistance
afs-5643	n c
afs-5643	viruses
afs-5643	transgenic plants
afs-5643	silencing
afs-5643	ptgs
afs-5643	expression
afs-5643	journal
afs-5643	e n
afs-5643	infection
afs-5643	mosaic
afs-5643	virology
afs-5643	pvyo
afs-5643	cell