PMID-sentid	Pub_year	Sent_text		comp_official_name	comp_offsetprotein_name	organism	prot_offset
9521656-2	1998	Here we report the processing of a number of ubiquitin derivatives by two human UCH isozymes (isozymes L1 and L3) and find that these enzymes show little discrimination based on the P1" amino acid, except that proline is cleaved slowly.	Proline	210-217	L1 cell adhesion molecule	Homo sapiens	103-112