@conference {40575,
	title = {The utilisation of whole body cysteine by the mammary gland of the lactating goat},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {54},
	year = {1994},
	month = {Jan},
	pages = {103-106},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Three lactating Saanen goats weighing 55-71 kg, producing 1.2-3.6 kg  
milk/day and fed <I>ad libitum</I> concentrates and hay, were infused via a  
jugular catheter with 35S-cysteine (35S-Cys) at 9.3 mCi/min for 9 hours.   
Blood samples were taken hourly and mammary tissue biopsied terminally.   
Concentrations and specific radioactivities (SRA) of cysteine (Cys) and  
glutathione (GSH) were determined in whole blood, plasma and mammary tissue.   
Mean arterial concentrations (nmoles/g{\textpm}SE) of Cys and GSH in whole blood,  
plasma and red blood cells were: 71{\textpm}7, 79{\textpm}9 and 19{\textpm}8; and 823{\textpm}30, 1.6{\textpm}01 and   
3426{\textpm}124 respectively.  Arterial SRA in whole blood at plateau (7-9h) of  
35S-Cys (352{\textpm}13 dpm/nmole) was higher than that for GSH (5.9{\textpm}0.7 
dpm/nmole).   
However the difference between intracellular SRA for Cys and GSH in  
mammary gland tissue was much less (231{\textpm}23 vs 146{\textpm}13 dpm/nmole).  Total  
uptake of Cys by one half of the mammary gland was 0.5{\textpm}0.2 g/day.  Whole  
body irreversible loss rate of Cys was 7.3{\textpm}0.7 g/day, giving a percentage  
utilisation of whole body Cys by the mammary gland of 13.6{\textpm}4.3. },
	issn = {1176-5283},
	author = {Knutson RJ and Lee J and Davis SR and Harris PM and MacKenzie DDS and McCutcheon SN}
}
