Enriched in several structures, including ABarpaapap; ABarpaappa; ABarpaappp; ABarppaapa; and anterior hypodermis based on RNA-seq and single-cell RNA-seq studies. Is affected by several genes including rrf-3; eat-2; and pmk-1 based on RNA-seq and microarray studies. Is affected by thirteen chemicals including stavudine; Zidovudine; and allantoin based on RNA-seq and microarray studies. Is predicted to encode a protein with the following domain: Chondroitin proteoglycan 4.