Microarray-based expression profile of histone chaperones in Arabidopsis and rice across different tissues. Heat maps show the expression profile of histone chaperones from Arabidopsis (A) and rice (B) across different tissues of the plants. Log2-transformed mean signal intensity values for each of the genes in the respective plant tissues were used to generate the heat maps. Average linkage method and Euclidean distance metric were used for clustering in the heat map. Color bars at the bottom of each of the heat maps show the corresponding scale for log2 expression. Roman numerals followed by uppercase letters represent position of some major clusters as referred to in the text.