Defined in file gbseq.asn C++ class: CGBAltSeqItem GBAltSeqItem ::= SEQUENCE { interval GBInterval OPTIONAL , isgap BOOLEAN OPTIONAL , gap-length INTEGER OPTIONAL , gap-type VisibleString OPTIONAL , gap-linkage VisibleString OPTIONAL , gap-comment VisibleString OPTIONAL , first-accn VisibleString OPTIONAL , last-accn VisibleString OPTIONAL , value VisibleString OPTIONAL }