Berstel and Boason introduced the partial words in the context of gene (or protein) comparision (1). To develop an overall picture of how genes are regulated during hyphal development the partial DNA arrays are used to study the difference in gene expression between wild type and the signalling mutants. Also Aldo de Luca developed a combinatorial method for the analysis of finite words for the study of biological molecules. This paper studies a relaxation of compatibility relation called K-compatibility and conjugacy of K- compatibility between partial arrays.Â