do not need assign value to the positions which didn't do the alternate aligne process
do not need assign value to the positions which didn't do the alternate aligne process

bioinformatics-centre/AsmVar,ShujiaHuang/AsmVar,ShujiaHuang/AsmVar,bioinformatics-centre/AsmVar,bioinformatics-centre/AsmVar,ShujiaHuang/AsmVar,ShujiaHuang/AsmVar,bioinformatics-centre/AsmVar,ShujiaHuang/AsmVar,bioinformatics-centre/AsmVar,ShujiaHuang/AsmVar,bioinformatics-centre/AsmVar