Filtering R lists

Hello
I am am new to R and any help with the following would be appreciated:
I have a list (example attached) and I would like to create a new list 
which is a filtered version of this list. I.e I would like a list that 
only contains elements with this value:

Chr 10 : 21853562 - 21855482

Any pointers/tips would be great.
Thanks!
Nikol

Bioinformatician/Computer Associate
Cambridge Institute for Medical Research
University of Cambridge
Wellcome Trust/MRC Building
Hills Road
Cambridge
CB2 0XY
01223 762111 

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