title: Patterns of purine nucleotides in some North Sea fish erythrocytes.
abstract: 1. The purine nucleotides were determined in the whole blood of 13 species of seawater teleosts and 3 species of selachians. 2. The ATP/ADP ratio ranged from 4 to 50 in the erythrocytes of the fish examined. 3. GTP is widely distributed in fish erythrocytes but its level ranged from 2 to 27 nmol/mg Hb, the highest value being observed in Conger. 4. Conger, Melanogrammus and Merlangus exhibited a GTP/ATP ratio higher than 1. The concentration of GTP per mol of Hb (physiologically most indicative) is higher than 1 in Conger, Melanogrammus, Merlangus and Pollachus, and close to 1 in Molva and Gadus.
mesh_terms: D000255:Adenosine Triphosphate / Q000097:blood; D000818:Animals; D001835:Body Weight; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004912:Erythrocytes / Q000378:metabolism*; D005399:Fishes / Q000097:blood*; D006160:Guanosine Triphosphate / Q000097:blood; D006400:Hematocrit; D006454:Hemoglobins / Q000378:metabolism; D011685:Purine Nucleotides / Q000097:blood*; D013045:Species Specificity
chemical_list: D006454:Hemoglobins; D011685:Purine Nucleotides; D006160:Guanosine Triphosphate; D000255:Adenosine Triphosphate