ID         ,
T=U       ! Replace all T's by U's,                                 :T=U:t=u
A. BBB    ! Replace first word by its first letter plus '.',        :?* *=?1. *2
AA. BBB   ! Replace first word by its first two letters plus '.',   :??* *=?1?2. *2
SHOW a-b  ! Show position 125 - 150,                                |mid(125,150)
HEAD 20   ! Show position 0 - 20,                                   |head(20)
TAIL 20   ! Show 20 last positions,                                 |tail(20)
CNT(A)    ! Count all 'A's,                                         |count(aA)
CNT(ACGT) ! Count all 'ACGTU',                                      |count("ACGTU")
CNT ambi  ! Count all small letters + ambiguous codes + '.',        |len("-ACGTU")
CNT ambi2 ! Count ambiguous c. + 'acgtu.' in range [100..len-100],  |mid(100,-99)|len("-ACGTU")
G+C       ! G+C content,                                            |count("gcGC");count("agctuAGCTU")|per_cent
CHECKALL  ! Overall Checksum,                                       |checksum
CHECKBAS  ! Checksum (no gaps),                                     |checksum(exclude=.-n;touppper)
DIFFECOLI ! Difference to ecoli sequence,                           |diff(SAI=ECOLI)
TAXONOMY  ! Taxonomy of species,                                    |taxonomy(1)
