title: Technical note: A linear model for predicting δ13 Cprotein.
abstract: OBJECTIVE
  Development of a model for the prediction of δ(13) Cprotein from δ(13) Ccollagen and Δ(13) Cap-co . Model-generated values could, in turn, serve as "consumer" inputs for multisource mixture modeling of paleodiet.
  
  
  METHODS
  Linear regression analysis of previously published controlled diet data facilitated the development of a mathematical model for predicting δ(13) Cprotein (and an experimentally generated error term) from isotopic data routinely generated during the analysis of osseous remains (δ(13) Cco and Δ(13) Cap-co ).
  
  
  RESULTS
  Regression analysis resulted in a two-term linear model (δ(13) Cprotein (%) = (0.78 × δ(13) Cco ) - (0.58× Δ(13) Cap-co ) - 4.7), possessing a high R-value of 0.93 (r(2)  = 0.86, P < 0.01), and experimentally generated error terms of ±1.9% for any predicted individual value of δ(13) Cprotein . This model was tested using isotopic data from Formative Period individuals from northern Chile's Atacama Desert.
  
  
  CONCLUSIONS
  The model presented here appears to hold significant potential for the prediction of the carbon isotope signature of dietary protein using only such data as is routinely generated in the course of stable isotope analysis of human osseous remains. These predicted values are ideal for use in multisource mixture modeling of dietary protein source contribution.
authors.affiliation: Department of Anthropology, University of Miami, Coral Gables, FL, 33124-2005.
authors.forename: William J
authors.initials: WJ
authors.lastname: Pestle
authors.affiliation: Department of Anthropology, The Ohio State University, Columbus, OH, 43210.|Instituto De Investigaciones Arqueológicas Y Museo, Universidad Católica Del Norte, San Pedro De Atacama, Chile.
authors.forename: Mark
authors.initials: M
authors.lastname: Hubbe
authors.affiliation: Department of Anthropology, University of Miami, Coral Gables, FL, 33124-2005.
authors.forename: Erin K
authors.initials: EK
authors.lastname: Smith
authors.affiliation: Department of Anthropology, University of Miami, Coral Gables, FL, 33124-2005.
authors.forename: Joseph M
authors.initials: JM
authors.lastname: Stevenson
mesh_terms: D000818:Animals; D000885:Anthropology, Physical; D001106:Archaeology / Q000379:methods*; D002247:Carbon Isotopes / Q000032:analysis*; D002677:Chile; D066046:Diet, Paleolithic; D004044:Dietary Proteins / Q000737:chemistry*; D005399:Fishes; D006801:Humans; D016014:Linear Models; D008322:Mammals; D008460:Meat / Q000032:analysis; D008954:Models, Biological
chemical_list: D002247:Carbon Isotopes; D004044:Dietary Proteins
keywords: anatomy; behavior; bioarchaeology; ecology; human biology; physiology