SFTPD and acute respiratory distress syndrome: A band of SP-D (approximately 43 kDa) was detected in the lung tissues from all the groups, but the level of SP-D was increased in the lung tissue from mice in the ALI/ARDS group (Lane 3) compared to that in the lung tissue from the mice in the non-ALI/ARDS (Lane 2) and control groups (Lane 1).