sentence: The human genome was searched for the following sequences with systematic variations at the 5 , 9 , 11 and 18 positions : d ( AGGGwGGGwGwAGGGAGwAGGG ) sequences 1md ( AGGGwGGGwGwTGGGCGwTGGG ) sequences 2md ( AGGGwGGGwGwTGGGCGwCGGG ) sequences 3m The c-kit upstream regions from various different species were obtained from the Ensembl web site www.ensembl.org ( using Ensembl release 43 ) .