Protein:RNA crosslinking

[Michael Robert Ladomery]

Hello, I'm looking for some info. for a write-up about the
molecular links generated by UV-irradiation of protein/RNA
complexes:

What amino-acids are crosslinked? What in the RNA is crosslinked?
To what extent can protein:protein crosslinking occur?

It's been a little difficult to dig this out of textbooks.
Any help would be greatly appreciated. Please reply to
mrl at st-andrews.ac.uk. Thanks.