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NIDCR-supported investigators have identified the gene responsible for this syndrome as PVRL1 , which encodes for a protein important in cell-cell adhesion . The Wall Street Journal reported that AIG 's own investigators have identified 60 additional transactions that could be problematic . University Police investigators have informed area law enforcement agencies about the incidents . What is also appealing to me as a researcher is that the investigators have conducted several different types of experiments . Recently , a number of investigators have employed systemic vasoconstrictors in an attempt to reverse the effects of nitric oxide on peripheral arterial vasodilation . Additionally , Customs investigators have conducted a number of fact-finding missions to countries in Asia and Latin America where child labor is believed to be prevalent in a number of industries . Internal Revenue Service criminal investigators have conducted interviews of former finance ministry individuals and exploited financial documents of the regime to obtain leads on the location of targeted assets . Under the Project Safebid umbrella , FTC attorneys and investigators have conducted training sessions for law enforcement authorities from coast to coast . Some investigators have identified a pattern of non-normal sleep in persons with HIV who have no known reason not to sleep normally . Finally , investigators have identified , in the brains of humans , monkeys , and guinea pigs , a new serotonin receptor , named SERTsite2 , that binds only cocaine and not other drugs that interact with the serotonin system . In the more than 30 years since Barker and Gump published their research , many other investigators have challenged the assumption that bigger schools are better schools . Forest Service investigators have conducted measurements of productivity ( above and below ground ) as well as nutrient cycles in undisturbed forest and on sand and clay soils . Recognizing this uncertainty and faced with practical limitations , investigators have employed several different methods to estimate human exposure to ELF-EMF . " " Stopping autoimmunity In the past 15 years , investigators have identified several beta cell proteins that can elicit autoimmunity in people predisposed to type 1 diabetes .