Venn diagram comparing the forelimb and hindlimb SAGE libraries with other libraries listed in Table 5. This figure is not drawn to scale. (Light gray circles) Forelimb SAGE library; (black circle) hindlimb SAGE library (as in Fig. 4); (white circle) pooled, nonlimb SAGE tags from six additional SAGE libraries; (bold numbers) tags observed more than once (tags represented in more than one library are inherently observed more than once); (numbers in parentheses) unique tags, including those observed once. For example, 407 tags were observed two times or more in the forelimb and not observed in either the hindlimb or pooled, nonlimb SAGE libraries.
