Düzenleyici gen topluluklarının saklı Markov modelleri kullanılarak zaman serisi mikrodizi ekspresyon profillerinden belirlenmensi

Time series microarrays capture multiple gene expression levels at discrete time points varying from minutes to days of a continuous cellular process. Analysis of high through put data requires automated and computer aided solutions. We propose a hidden Markov model (HMM) based approach to identify regulatory relations between the periodic genes from the cell cycle time-series microarrays. We train and test our models by using distinct types of biological data present literature. In our study we use Pramila time series dataset. Training gene pairs include transcriptional regulation and protein level regulation. After identification of gene to gene regulatory relationships, we form a network of gene regulation relationships: Gene Regulatory Neighborhood Networks (GRNN). We explore potential use of sub networks (communities) in GRNN by comparing gene clusters found by popular clustering algorithms such as K-means clustering. Our results indicate we manage to identify denser and more specific enrichment in community structure based clusters than the clusters acquired with K-means.