searching list of words in a cell

thanks for the help. I actually know that words in column A are located in front of "GENE=" or "lOCUS=".
using your formula a lot of unwanted matches were found. for example for word "nasE" the row containing "dehydrogenase" word was reported as match.
(Some cells do not have any "GENE=" or "lOCUS="). My first priority is the match located in front of "GENE=" though.
Can you suggest me any formula that only searches the words in front of "GENE=" or "lOCUS="?

here is an example of a cell content in column B:
1121158 // gi|1121158|ref|NC_002758.2|NC_002758.2(GI:57634611):1234382-1236618(+) Staphylococcus aureus subsp. aureus Mu50, GENE=pbpA PRODUCT=penicillin-binding protein 1 LOCUS=SAV1181 // ncbi_bacterial // 20 // --- /// 1123855 // gi|1123855|ref|NC_002745.2|NC_002745.2(GI:29165615):1158053-1160289(+) Staphylococcus aureus subsp. aureus N315, GENE=pbpA PRODUCT=penicillin-binding protein 1 LOCUS=SA1024 // ncbi_bacterial // 20 // --- /// 3236102 // gi|3236102|ref|NC_002951.2|NC_002951.2(GI:57650036):1197639-1199875(+) Staphylococcus aureus subsp. aureus COL, GENE=pbp1 PRODUCT=penicillin-binding protein 1 LOCUS=SACOL1194 // ncbi_bacterial // 20 // ---

best
Nazanin