Identity management specialists GB Group was slightly lower despite saying that interim pre-tax profit was marginally ahead of the same period last year.Profit before taxation stood at £135,000 for the interim period to 13 July 2009 compared with £41,000 the same time a year earlier. Revenue for the period fell to £5m from £5.7m in 2008 after a one-off settlement of £0.4m for licence arrears. Underlying revenue from operations were £0.3m lower than the same period last year. Cash balances were £5.3m at 30 June 2009, up from £4.5m previously ended 31 March 2009.Gene therapy company Oxford Biomedica was also lower today after issuing an update on the Phase I/II study of ProSavin, its treatment of Parkinson's disease. Patients treated at the first dose level have maintained their improvement in motor function for one year, with an average improvement of 29%, according to the group.Analogous investigator assessments of patients in the second cohort treated at a higher dose level have achieved similar benefit at three months, and the first patient to reach their six-month assessment has demonstrated further improvement, it added.FTSE TechMARK - FallersAlizyme (AZM) 2.60p -17.72%Kofax (KFX) 129.00p -4.97%Dialight (DIA) 130.00p -4.76%Oxford Biomedica (OXB) 11.00p -4.35%Trafficmaster (TFC) 28.00p -3.45%KCOM Group (KCOM) 26.50p -2.75%Alphameric (ALM) 29.00p -2.52%GB Group (GBG) 23.00p -2.13%Renovo Group (RNVO) 26.00p -1.89%Intec Telecom (ITL) 81.25p -1.22%FTSE TechMARK - RisersPhytopharm (PYM) 5.25p +7.58%Puricore (PURI) 16.75p +4.69%Vislink (VLK) 28.00p +3.70%Psion (PON) 65.50p +3.15%AEA Technology (AAT) 26.75p +2.88%Imagination Technologies (IMG) 143.25p +2.32%Parity Group (PTY) 12.75p +2.00%Antisoma (ASM) 27.00p +1.89%Vernalis (VER) 79.00p +1.28%Wolfson Microelectronics (WLF) 92.25p +1.10%