Global Gene Expression Market By Process (Sample Collection, Purification, cDNA Synthesis & Conversion, PCR Analysis, Data Analysis & Interpretation), By Product (Kits & Reagents, DNA Chips, and Others), By Application (Drug Discovery & Development, Clinical Diagnostics, Biotech & Microbiology, and Others), By Technique (RNA Expression, Promoter Analysis, and Protein Expression & Posttranslational Modification Analysis), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2025-2034