$ vmatch -l 20 -s 90 -dbmaskmatch X swissp.sp.gz 
>110K_PLAKN 110 KD ANTIGEN (PK110) (FRAGMENT).
FNSNMLRGSVCEEDVSLMTSIDNMIEEIDFYEKEIYKGSHSGGVIKGMDYDLEDDENDEDEMTEQMVEEVADHITQDMIDEVAHHVLDNI
THDMAHMEEIVHGLSGDVTQIKEIVQKVNVAVEKVKHIVETEETQKTVEPEQIEETQNXXXXXXXXXXXXXXXXXXXXXXXXXXXXXQIE
ETQKTVEPEQTEEAXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXPTQETQNTVEP
