Exercises marked with (*) require further reading/search beyond the suggested texts.
1. (*) Find the position of the rII region in the complete genome of bacteriophage T4.
Answer:
The rII region is composed of two subregions, rIIA and rIIB. Region rIIA is located in positions 12..2,189 of the T4 reference genome in NCBI (reverse strand). Region rIIB is located in positions 167,965..168,903 (reverse strand). It should be noted that 168,903 is the last position in this genome. Therefore, the rII region spans the reference origin or, more exactly, the reference origin for this circular genome has been selected inside the rII region.
© 2015 Joao Meidanis