{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nNote that the provided abstracts do not mention SNORD12; rather, they describe the characteristics and roles of the ARL4 protein. In the first study"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": ", ARL4 is identified as a 22‐kDa GTP-binding protein that appears during the later stages of testis development. Its expression is confined to pre- and postmeiotic germ cells, and disruption of the Arl4 gene leads to a moderate reduction in testis weight and sperm count, suggesting that ARL4 plays a supportive role in ensuring the timely progression of germ cell maturation, particularly during meiotic phases.\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nThe second study"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": "places ARL4 within a broader developmental context. Here, ARL4 is among a diverse set of genes identified in the early somite, specifically expressed in the dermomyotome region. Although this work focused on downstream targets of WNT signaling and compared gene profiles in presomitic mesoderm versus newly formed somites, ARL4 was noted as differentially regulated and, unlike some other genes such as Troy, did not emerge as a direct canonical WNT target.\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nCollectively, these studies indicate that ARL4 functions in distinct developmental processes. In reproductive biology, ARL4 appears to facilitate germ cell development during spermatogenesis, with its absence leading to a delayed or reduced maturation of these cells. In embryonic development, its expression within the somite-derived dermomyotome suggests an ancillary role in tissue patterning and differentiation. Although the abstracts do not address SNORD12, the highlighted functions of ARL4 underscore its importance in both gonadal and somite development."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "A Schürmann, S Koling, S Jacobs, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Reduced sperm count and normal fertility in male mice with targeted disruption of the ADP-ribosylation factor-like 4 (Arl4) gene."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Mol Cell Biol (2002)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1128/MCB.22.8.2761-2768.2002"}], "href": "https://doi.org/10.1128/MCB.22.8.2761-2768.2002"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "11909968"}], "href": "https://pubmed.ncbi.nlm.nih.gov/11909968"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Laura Buttitta, Tetsuya S Tanaka, Alice E Chen, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Microarray analysis of somitogenesis reveals novel targets of different WNT signaling pathways in the somitic mesoderm."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Dev Biol (2003)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/s0012-1606(03)00116-7"}], "href": "https://doi.org/10.1016/s0012-1606(03"}, {"type": "t", "text": "00116-7) PMID: "}, {"type": "a", "children": [{"type": "t", "text": "12781685"}], "href": "https://pubmed.ncbi.nlm.nih.gov/12781685"}]}]}]}