The purine ring system is shown below.What is the source of the C-6 atom during de novo biosynthesis of purines? 
Definitions:
Wound Care
The management and treatment of sores, cuts, or injuries to the skin to promote healing and prevent infection.
Distraction
A technique used to divert an individual's attention away from an activity or sensation that might be undesirable or painful, often used in managing pain or anxiety.
Meal Plan
A schedule or strategy for planning meals ahead of time, often used for dietary, weight management, or health-related reasons.
Demonstration
A method of teaching or showing how something works or is performed, often used in educational settings or protests.
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