CNT_NUCS      ! count nucleotides,                             nuc#|sequence|count("agctuAGCTU")
CNT_NUCS_TERM ! count nucleotides gene,                        nuc_term#|sequence|filter(SAI=ECOLI,exclude=.-)|count("ACGTU")
CNT_AACIDS    ! count amino acids,                             aa#|sequence|count("ACDEFGHIKLMNPQRSTVWYacdefghiklmnpqrstvwy")
GC_CONT       ! calculate G+C content,                         GC#|sequence|count("gcGC");count("agctuAGCTU")|"G+C:";per_cent
GC_CONTH      ! calculate G+C content helical parts only,      GCH#|sequence|filter(SAI=HELIX;exclude=.-)|count("gcGC");count("agctuAGCTU")|"GCH=";per_cent;"(";cut(2);")"
GC_CONTNH     ! calculate G+C content non helical parts only,  GCN#|sequence|filter(SAI=HELIX;include=.-)|count("gcGC");count("agctuAGCTU")|"GCN=";per_cent;"(";cut(2);")"