title: In vivo and solid state 13C nuclear magnetic resonance studies of tyrosine metabolism during insect cuticle formation.
abstract: 1. Tyrosine metabolism during pupation can be followed in living Heliothis virescens larvae using nuclear magnetic resonance spectroscopy. 2. Loss of 13C signals from a label at the C-3 position of tyrosine during pupation indicates uptake of tyrosine into solid cuticle. 3. Solids 13C NMR spectroscopy of cuticle formed by insects injected with 3-13C labelled tyrosine indicates that little change in chemical shift occurs during cuticle hardening, indicating that the side chain is probably not involved in protein cross-linking.
authors: Department of Chemistry, Texas A&M University, College Station 77843.
authors: H J
authors: HJ
authors: Williams
authors: A I
authors: AI
authors: Scott
authors: W R
authors: WR
authors: Woolfenden
authors: D M
authors: DM
authors: Grant
authors: S B
authors: SB
authors: Vinison
authors: G W
authors: GW
authors: Elzen
authors: E H
authors: EH
authors: Baehrecke
mesh_terms: D000818:Animals; D007814:Larva / Q000378:metabolism; D007915:Lepidoptera / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy; D012016:Reference Values; D014443:Tyrosine / Q000378:metabolism*
chemical_list: D014443:Tyrosine