Immunogen sequence: AELCVNSLEK FHFKSWMSKH RKTYSTEEYH HRLQTFASNW RKINAHNNGN HTFKMALNQF SDMSFAEIKH KYLWSEPQNC SATKSNYLRG TGPYPPSVDW RKKGNFVSPV KNQGACGS Positive Samples: K-562, A-549, HT-29; Cellular Location: Lysosome. The cathepsin family of proteolytic