[i] Statistics of ORs found in the human genome draft, in finished or only in unfinished genomic clones (summed as Large genomic); then those in unlocalized genomic segments (e.g., genomic PCR products) but not in large genomic clones; and, finally, those from additional, nongenomic sources (ESTs, mRNAs) and yet unrepresented in the genomic clones.

[ii] Conf: indicates the number of ORs for which more than one sequenced clone is available. Intact indicates the number of ORs with uninterrupted, full-length coding regions. Chrom and Loc indicate the number of ORs for which a chromosomal assignment could be made, and those for which a coordinate is available.