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Amino acid identities between the various domains of zebrafish nuclear progestin receptor (Pgr) and those of PGRs in other vertebrates are indicated by the numbers in the respective domain. For comparison, the other zebrafish nuclear steroid receptors, including Ar, glucocorticoid (Gr or Nr3c1), mineralocorticoid (Mr or Nr3c2), and estrogen receptors (Esr), are also included. The numbers below the line indicate positions of amino acids from the translation starting site.
