{'fraction_non_alphanumeric': 0.027837259100642397, 'fraction_numerical': 0.011777301927194861, 'mean_word_length': 5.3175675675675675, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Expression of two growth hormone genes in the Xenopus pituitary gland.

Growth hormone (somatotropin) is a 22-kD polypeptide produced by the somatotrophs of the pituitary gland. During differential hybridization analysis of biosynthetically active and inactive Xenopus pituitary cells (1), a cDNA clone (pX8) was isolated and found to code for Xenopus growth hormone mRNA. Subsequent screening of the pituitary cDNA library with pX8 resulted in the isolation of cDNA clones structurally different from this clone, indicating expression of two growth hormone genes in the Xenopus pituitary gland. In the sequences presented nucleotide and amino acid differences are indicated by colonp and by the presence of amino acids in the B sequence, respectively. Amino acid similarity between Xenopus growth hormones A and B is remarkably low (only 75%); similarities with other vertebrate growth hormones range from 43% (salmon) to 78% (duck).