Identification of new GP candidates. (Left) Hierarchical clustering of 6700 differentially expressed genes in PM, MY, and bm-PMN populations. The relative expression levels for genes in each BM population (n = 9) are presented by a color scale, whereby red reflects high expression (3 × SD), white reflects mean expression, and blue reflects low expression (-3 × SD). (Right) Lists of genuine GPs and new GP candidates. Genes were defined as GP candidates if they had expression profiles similar to genuine GPs (ie, assigned to cluster 1, 3, 4) and had reported functions critical for immune response.