Later, the squadron upgraded to Salmson 2-A2s SPAD Xis, and Breguet BR-14 observation aircraft. South Africa received two F.II and 14 PR.XVI/XIs and Sweden received 60 NF.XIXs. Lippi's starting XIs were never fixed. Several Scottish League clubs fielded 2nd XIs ('A' sides), as well as Queens Park Strollers. The current population of XIS is about 550 students. Three of their wins came against the second XIs of Essex, Glamorgan and Leicestershire. The company became known as Xerox Imaging Systems (XIS), and later ScanSoft. Int and xis are integration and excision proteins vital to lysogeny. Ge finds out Rui Xis secret and also the gay doctor (Dr. Mei Tian). This also applied to the PR Mk Xs and most PR Mk XIs. Leftward transcription expresses the "gam", "red", "xis", and "int" genes.