Whilst I can input SAD SAD data ie two different SAD datasets using Group =1 and Group =2 with the "Wavelength" keyword, how do I input 2 different crystals using the "crystal_info" keyword which does not recognize Group = Inputting .sca unmerged anomalous data how do I input data for 2 different crystal_info keywords with different heavy atoms and different unit cells? thanks Nora Dr N B Cronin X-Ray Laboratory Manager Tel. (+44) 020 7153 5445 Section of Structural Biology Fax. (+44) 020 7153 5457 Chester Beatty Laboratories mobile: (+44) 07787554059 The Institute of Cancer Research 237 Fulham Road London SW3 6JB The Institute of Cancer Research: Royal Cancer Hospital, a charitable Company Limited by Guarantee, Registered in England under Company No. 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP. This e-mail message is confidential and for use by the addressee only. If the message is received by anyone other than the addressee, please return the message to the sender by replying to it and then delete the message from your computer and network.