FIELD T-2 

 Columns 58, 59, 60, and 61 



The code symbols on this page. Symbols F6--, F8--, F9--, FA--, FB--, FC--, FG--, FH--, 

 and FI--, require appending one of the code symbols of the opposing list (Symbols --1, --11, etc. ) 

 to indicate the chemical whose metabolic handling is affected by the test compound. They are coded 

 with Symbols 7, 1, 2, or 3 of Field T-1 (only Symbol 7, in the case of Symbol FH--), unless the test 

 compound affects a secondary compound's effect on the metabolic handling of compounds of the oppos- 

 ing list (Symbols 8, 9, A, or C of Field T-1). Symbol FA-- and FB-- (and, when a pathology is coded 

 in Field E, Symbols F8-- and FI--) can be combined with Symbol --B (to make Symbols FAB, FBB, FSB, 

 and FIB) and coded with Symbol 7 (never with Symbols 8, 9, A, or C) of Field T-1 to indicate that the 

 test compound is stored, absorbed, synthesized, or withdrawn. Each of the nine symbols is defined 

 only briefly here to permit all nine being on a single page for convenience in matching and combining 

 them with the symbols of the opposing list. The Key continues the definition for each separately, indi- 

 cating specifications and limitations of their use; reference must be made to those Key definitions and 

 explanations to use the symbols correctly. 



In each case, identify in Field D the specific secondary compound (indicated in Field T-2 only 

 by type, by the last two units of the symbol), if known, except when Field T-1 is coded with Symbol 8, 

 9, A, or C, when the secondary compound (whose effect on the metabolism of the compound indicated 

 by one of the symbols of the following list is affected by the test compound) is coded in Field D and 

 the specific identity of the compound whose metabolism is affected is only written, not coded, in 

 Field T-2. 



F6-- Nutrient uptake; uptake of the type of 



nutrient indicated by the last two units 

 of the symbol. 



F8-- Chemosynthesis; synthesis of the type 



of secondary compound indicated by the 

 last two units of the symbol; synthesis 

 of the test compound indicated by 

 Symbol FSB (ONLY when synthesis of 

 the test compound is a symptom of a 

 pathology coded in Field E). 



F9-- Distribution of the type of secondary 

 compound indicated by the last two 

 units of the symbol. 



FA-- Storage, deposit, concentration, or 



tissue level of the type of secondary 

 compound indicated by the last two 

 units of the symbol; storage, deposit, 

 or tissue level of the test compound. 

 Indicated by Symbol FAB. 



FB-- Absorption of the type of secondary 

 compound indicated by the last two 

 units of the two units of the symbol; 

 absorption of the test compound. Indi- 

 cated by Symbol FBB. 



FC-- Excretion, secretion, guttation, or exu- 

 dation (resulting in loss or with the 

 objective of discard ) of the type of 

 normal secondary compound indicated 

 by the last two units of the symbol. 

 For endocrine secretion or other secre- 

 tion not representing loss or discard, 

 use symbols other than FC--. Consult 

 the Key . (Use Symbol FC-- only for ex- 

 cretion or secretion of compounds normal 

 to any of the normal excretory or secre- 

 tory organs or tissues. ) Use Symbol 

 FF-- (defined after symbols of the FE-- 

 series) to code excretion or secretion 

 of the test compound or any other com- 

 pound not normal to the excretory or 

 secretory tissue or organ. 



FG-- Ability to permeate or penetrate; ability, 

 of the type of secondary compound 

 indicated by the last two units of the 

 symbol, to permeate or penetrate cells, 

 tissues, or membranes. 



FH-- Incorporation of the test compound per se 

 into the type of secondary compound 

 indicated by the last two units of the 

 symbol. 



FI-- Withdrawal of the type of secondary 

 compound indicated by the last two 

 units of the symbol; withdrawal of the 

 test compound indicated by Symbol 

 FIB (ONLY when this withdrawal of the 

 test compound is a symptom of a 

 pathology coded in Field E). 



158 



