id	keyword
afs-71252	acid
afs-71252	chromosomes
afs-71252	heterochromatin
afs-71252	thymonucleic
afs-71252	cell
afs-71252	caspersson
afs-71252	parts
afs-71252	proteins
afs-71252	histones
afs-71252	darlington
afs-71252	segments
afs-71252	metabolism