You may be looking for the blood type T-negative.

T-Negative was a fanzine operated by Ruth Berman and published in the 1960s and 70s. It was completely devoted to Star Trek-related fan fiction and articles.

Dorothy Jones wrote a series of Star Trek stories for this magazine entitled Dorothy and Myfanwy throughout the late 1960s and early 1970s. Jacqueline Lichtenberg's early Kraith tales first appeared here. Greg Jein wrote an influential analysis of starship registries for this magazine entitled The Case of Jonathan Doe Starship, published in the April 1973 issue.