              W
lys_c                               K(?!P)
lys_c/p                             K
lys_n                               .K
ntcb                                \w(?=C)
pepsin ph1.3                        ((?&lt;=[^HKR][^P])[^R](?=[FL][^P]))|((?&lt;=[^HKR][^P])[FL](?=\w[^P]))
pepsin ph2.0                        ((?&lt;=[^HKR][^P])[^R](?=[FLWY][^P]))|((?&lt;=[^HKR][^P])[FLWY](?=\w[^P]))
proline endopeptidase               (?&lt;=[HKR])P(?=[^P])
proteinase k                        [AEFILTVWY]
staph