[R] Package for Molecular Properties

[bbb_@@@ m@ili@g off verizo@@@et]

All

Is there a package or library that will, given a nucleotide sequence

1. calculate the extinction coefficient at 260 nm for (Beer-Lambert's law)
2. calculate molecular weight 
3. return it's complementary sequence 

I was able to find several packages that can do similar calculations for an amino acid sequence for proteins but none for nucleic acids.

Any pointers, etc. would be great.

thank you in advance
Indr