Receptor transcripts were 4 . 6 kilobases ( kb ) , and no variant sizes were observed .
receptor transcripts were 4 . 6 kilobases ( kb ) , and no variant sizes were observed .
B-RNA_family_or_group I-RNA_family_or_group O B-RNA_N/A I-RNA_N/A I-RNA_N/A I-RNA_N/A O O O O O O O O O O O