Dear Alex, to show my command of the obvious, most enzymes end in "-ase", so only problem is where does the 'casp-" come from. Trouble is that could be a sort of acronym for GOK (God only knows what). Nobody on the board has your background for figuring this one out. (doc_comfort hasn't posted for a long time, and wofahulicodoc surely can't find the time to read about cell biology).

Here's a URL about it, all Greek to me:
http://www.nature.com/cgi-taf/DynaPage.taf?file=/cdd/journal/v8/n4/abs/4400864a.html&dynoptions=doi1069875278

Only eager beavers will want to look at the above URL, and they know how to copy and paste it into Address box
Here's another URL, maybe a few clues
http://www.sfu.ca/mbb/mbb/faculty/pio/pio.html