Short Communication Two palmitylated cysteine residues of the severe acute respiratory syndrome coronavirus spike (S) protein are critical for S incorporation into virus-like particles, but not for M–S co-localization Makoto Ujike,1 Cheng Huang,2 Kazuya Shirato,3 Shutoku Matsuyama,3 Shinji Makino2 and Fumihiro Taguchi1 Correspondence Makoto Ujike