Mase format is a flatfile format use by the SeaView multiple alignment editor, developed by Manolo Gouy.

;; saved by seaview on Wed Jan  7 11:14:33 1998
;;# of segments=14 all seqs
;; 25,25 27,27 30,30 96,96 98,98 117,117 149,149 160,160 164,164 173,173
;; 258,258 282,282 289,289 291,291
;no comment
AK1H_ECOLI
CPDSINAALICRGEKMSIAIMAGVLEARGH-N--VTVIDPVEKLLAVG-HYLESTVDIAE
STRRIAASRIP------A-DHMVLMAGFTAGN-EKGELVVLGRNGSDYSAAVLAACLRAD
CCEIWTDVNGVYTCDP-------------RQVPDARLLKSMSYQEAMELSY--FGAKVLH
PRTITPIAQFQIPCLIKNTGNPQAPGTL-IG--ASRDEDELP----VKGISNLN------
NMAMFSVSGP-GMKGMVGMAARVFAAMS-------RARISVVLITQSSSEYSISFCVPQS
DCVRAERAMLEEFY-----LELKEGLLEPLAVAERLAIISV-VGDGLRTLRGISAKF---
---FAALARANINIVAIA
;no comment
AKH_HAEIN
-----------------VEDAVKATIDCRGEKLSIAMMKAWFEARGY-S--VHIVDPVKQ
LLAKG-GYLESSVEIEESTKRVDAANIA--K-DKVVLMAGF---TAGNEKGELVLLGRNG
SDYSAAC-----------------LAACLGASVCEIWTDVDGVYTCDP--RLVPDARLLP
TLSYREAMELSYFGAKVIHPRTIGPLLPQNIPCVIKNTGNPSAPGSI-ID--GNVKSESL
Q----VKGITNLDNLAMFNVSGPGMQGM---VGMASRVFSAMSGAGISVILITQSSSEYS
---ISFCVPVKSAEVAKTVLETEFA-----NELNEHQLEPIEVIKDLSIISV-VGDGMKQ
AKGIAARF------FSALAQAN