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Retrotransposons (which include LINEs, SINEs, and ERVs) are known for the ability of their long-terminal repeats (LTRs) to serve as promoters and enhancers for regulating the expression of genes that are immediately downstream (Conley et al., 2008; Dunn et al., 2005). The majority of retrotransposons, however, are located considerable distances from genes (often hundreds of kilobases away) — […]
When I was an undergraduate biology student, one of my favorite topics was the complement system in immunology. The complement cascade is an array of sequentially interacting proteins that serve a vital role in innate immune responses. The complement cascade can be activated via interactions with antibody-antigen complexes. Proteins involved in the complement cascade react […]
A new study by Rebecca Martin of the University of Colorado finds that “Solar systems with life-bearing planets may be rare if they are dependent on the presence of asteroid belts of just the right mass.” Science Daily summarizes: “They suggest that the size and location of an asteroid belt, shaped by the evolution of the […]
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Are you ready for the challenge to help young people know the truth? 75 percent of Christian young people stop attending church after high school, and only about a third of them return by age 30. Intellectual skepticism is a major reason they leave. CrossExamined.org is one of the few ministries addressing that problem. Led […]
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