Amino acid sequences of F protein cleavage site from APMVs. NDV (lentogenic); strain
LaSota, NDV (velogenic); strain Herts 33, APMV-4/HK/D3; APMV-4/duck/Hong Kong/D3/1975,
APMV-5/Kunitachi; APMV-5/budgerigar/ Japan/Kunitachi/1974, APMV-6/TWN/Y1;
APMV-6/duck/Taiwan/Y1/1998, APMV-8/DE; APMV-8/goose/Delaware/1053/1976, APMV-9/NY;
duck/New York/22/1978, APMV-10/FLK/324; APMV10/penguin/Falkland Islands/324/2007,
APMV-11/FRA/100212; APMV-11/common_snipe/France/100212/2010. Abbreviations of other
APMV are given in the text.