@article{MAKHILLAJIT201615236624, title = {Improved Exact Parallel Algorithm for Planted (l, d) Motif Search}, journal = {Asian Journal of Information Technology}, volume = {15}, number = {23}, pages = {4835-4843}, year = {2016}, issn = {1682-3915}, doi = {ajit.2016.4835.4843}, url = {https://makhillpublications.co/view-article.php?issn=1682-3915&doi=ajit.2016.4835.4843}, author = {Satarupa and}, keywords = {Planted motif search,Symmetric Multi Processor (SMP),Message Passing Interface (MPI),bit map vector,string algorithm}, abstract = {Motif search in computational biology is a most challenging problem. This plays a crucial role in gene finding and understanding the gene regulation relationship. In this study, a new efficient algorithm is proposed for the (l, d) motif search problem to find all string of length l which present in each of the input string with d mismatches. The method is based on 2 key aspects. First, a group of 3 l-mers of close proximity is processed efficaciously to generate the common d-neighborhood and second the data structure bit vector is used which simplifies the process of making the union and intersection of the common d-neighborhood. The proposed approach can be considered to be a hybrid one, as it integrates the existing algorithm with the novel ideas of common d-neighborhood generation to achieve better running time. Moreover, a parallel version of proposed method is also presented which runs on 4 SMP cluster systems with each of 2.4 GHz Intel Pentium-IV having 16 GB ram running under Red Hat Linux. The experimental result shows that the proposed algorithm is linearly scalable with the number of processors.} }