In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

 The preference for third base codon in Y position prolines is U for the alpha 2 ( VI ) collagen as it is for the human fibrillar collagen genes .
alpha 2

 Upstream of the afa - 3 gene cluster , a 1 . 2 - kb region was found to be 96 % identical to the RepFIB sequence of one of the enterotoxigenic E . coli plasmids ( P307 ) , suggesting a common ancestor plasmid .
RepFIB sequence

 The coding region of nifA was determined using a translational lacZ fusion and by site - directed mutagenesis to identify which of four in frame AUG codons was used .

lacZ fusion