TY - PAT T1 - Designer proteases UR - http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=7&f=G&l=50&co1=AND&d=PTXT&s1=6,383,775&OS=6,383,775&RS=6,383,775 PY - 2002/01/01 AU - Sayers JR AU - Duff GW ED - Y2 - 2025/05/29 ER -