const str = ">abtest3_VHH\nMDAAIYYCAAVSS\n>seq1\nMDSLQMNNLKPEDTAI\n>abtest3_VHH\nMDAAIYYCAAVSS\n>seq1\nMDSLQMNNLKPEDTAI";\n\nconst regex = /([^>]+(?:>[^>]+)*)/g;\nconst matches = str.match(regex);\nconsole.log(matches); // ['>abtest3_VHH\nMDAAIYYCAAVSS\n>seq1\nMDSLQMNNLKPEDTAI\n', '>abtest3_VHH\nMDAAIYYCAAVSS\n>seq1\nMDSLQMNNLKPEDTAI']

abtest3_VHH Sequence Data -  MDAAIYYCAAVSS, MDSLQMNNLKPEDTAI

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